diff --git a/src/cpl-api/cpl/api/abc/__init__.py b/src/cpl-api/cpl/api/abc/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/src/cpl-api/cpl/api/abc/asgi_middleware_abc.py b/src/cpl-api/cpl/api/abc/asgi_middleware_abc.py
new file mode 100644
index 00000000..1e593e97
--- /dev/null
+++ b/src/cpl-api/cpl/api/abc/asgi_middleware_abc.py
@@ -0,0 +1,15 @@
+from abc import ABC, abstractmethod
+
+from starlette.types import Scope, Receive, Send
+
+
+class ASGIMiddleware(ABC):
+    @abstractmethod
+    def __init__(self, app):
+        self._app = app
+
+    def _call_next(self, scope: Scope, receive: Receive, send: Send):
+        return self._app(scope, receive, send)
+
+    @abstractmethod
+    async def __call__(self, scope: Scope, receive: Receive, send: Send): ...
diff --git a/src/cpl-api/cpl/api/error.py b/src/cpl-api/cpl/api/error.py
index 5555d006..b58df339 100644
--- a/src/cpl-api/cpl/api/error.py
+++ b/src/cpl-api/cpl/api/error.py
@@ -1,11 +1,17 @@
 from http.client import HTTPException
 
 from starlette.responses import JSONResponse
+from starlette.types import Scope, Receive, Send
 
 
 class APIError(HTTPException):
     status_code = 500
 
+    @classmethod
+    async def asgi_response(cls, scope: Scope, receive: Receive, send: Send):
+        r = JSONResponse({"error": cls.__name__}, status_code=cls.status_code)
+        return await r(scope, receive, send)
+
     @classmethod
     def response(cls):
         return JSONResponse({"error": cls.__name__}, status_code=cls.status_code)
diff --git a/src/cpl-api/cpl/api/middleware/authentication.py b/src/cpl-api/cpl/api/middleware/authentication.py
index 98481b3b..4b4b5cc6 100644
--- a/src/cpl-api/cpl/api/middleware/authentication.py
+++ b/src/cpl-api/cpl/api/middleware/authentication.py
@@ -1,21 +1,28 @@
 from keycloak import KeycloakAuthenticationError
+from starlette.types import Scope, Receive, Send
 
+from cpl.api.abc.asgi_middleware_abc import ASGIMiddleware
 from cpl.api.api_logger import APILogger
 from cpl.api.error import Unauthorized
 from cpl.api.middleware.request import get_request
 from cpl.api.router import Router
 from cpl.auth.keycloak import KeycloakClient
+from cpl.auth.schema import AuthUserDao, AuthUser
 from cpl.dependency import ServiceProviderABC
 
 _logger = APILogger(__name__)
 
 
-class AuthenticationMiddleware:
+class AuthenticationMiddleware(ASGIMiddleware):
 
-    def __init__(self, app):
-        self._app = app
+    @ServiceProviderABC.inject
+    def __init__(self, app, keycloak: KeycloakClient, user_dao: AuthUserDao):
+        ASGIMiddleware.__init__(self, app)
 
-    async def __call__(self, scope, receive, send):
+        self._keycloak = keycloak
+        self._user_dao = user_dao
+
+    async def __call__(self, scope: Scope, receive: Receive, send: Send):
         request = get_request()
         url = request.url.path
 
@@ -25,27 +32,41 @@ class AuthenticationMiddleware:
 
         if not request.headers.get("Authorization"):
             _logger.debug(f"Unauthorized access to {url}, missing Authorization header")
-            return Unauthorized(f"Missing header Authorization").response()
-
+            return await Unauthorized(f"Missing header Authorization").asgi_response(scope, receive, send)
 
         auth_header = request.headers.get("Authorization", None)
         if not auth_header or not auth_header.startswith("Bearer "):
-            return Unauthorized("Invalid Authorization header").response()
+            return await Unauthorized("Invalid Authorization header").asgi_response(scope, receive, send)
 
         token = auth_header.split("Bearer ")[1]
         if not await self._verify_login(token):
             _logger.debug(f"Unauthorized access to {url}, invalid token")
-            return Unauthorized("Invalid token").response()
+            return await Unauthorized("Invalid token").asgi_response(scope, receive, send)
 
         # check user exists in db, if not create
-        # unauthorized if user is deleted
-        return await self._app(scope, receive, send)
+        keycloak_id = self._keycloak.get_user_id(token)
+        if keycloak_id is None:
+            return await Unauthorized("Failed to get user id from token").asgi_response(scope, receive, send)
 
-    @classmethod
-    async def _verify_login(cls, token: str) -> bool:
-        keycloak = ServiceProviderABC.get_global_service(KeycloakClient)
+        user = await self._get_or_crate_user(keycloak_id)
+        if user.deleted:
+            _logger.debug(f"Unauthorized access to {url}, user is deleted")
+            return await Unauthorized("User is deleted").asgi_response(scope, receive, send)
+
+        return await self._call_next(scope, receive, send)
+
+    async def _get_or_crate_user(self, keycloak_id: str) -> AuthUser:
+        existing = await self._user_dao.find_by_keycloak_id(keycloak_id)
+        if existing is not None:
+            return existing
+
+        user = AuthUser(0, keycloak_id)
+        uid = await self._user_dao.create(user)
+        return await self._user_dao.get_by_id(uid)
+
+    async def _verify_login(self, token: str) -> bool:
         try:
-            token_info = keycloak.introspect(token)
+            token_info = self._keycloak.introspect(token)
             return token_info.get("active", False)
         except KeycloakAuthenticationError as e:
             _logger.debug(f"Keycloak authentication error: {e}")
diff --git a/src/cpl-api/cpl/api/middleware/logging.py b/src/cpl-api/cpl/api/middleware/logging.py
index 6a9f888e..7eeb9eea 100644
--- a/src/cpl-api/cpl/api/middleware/logging.py
+++ b/src/cpl-api/cpl/api/middleware/logging.py
@@ -1,20 +1,22 @@
 import time
 
 from starlette.requests import Request
-from starlette.types import ASGIApp, Receive, Scope, Send
+from starlette.types import Receive, Scope, Send
 
+from cpl.api.abc.asgi_middleware_abc import ASGIMiddleware
 from cpl.api.api_logger import APILogger
 from cpl.api.middleware.request import get_request
 
 _logger = APILogger(__name__)
 
-class LoggingMiddleware:
-    def __init__(self, app: ASGIApp):
-        self.app = app
+class LoggingMiddleware(ASGIMiddleware):
+
+    def __init__(self, app):
+        ASGIMiddleware.__init__(self, app)
 
     async def __call__(self, scope: Scope, receive: Receive, send: Send):
         if scope["type"] != "http":
-            await self.app(scope, receive, send)
+            await self._call_next(scope, receive, send)
             return
 
         request = get_request()
@@ -32,7 +34,7 @@ class LoggingMiddleware:
                 response_body += message.get("body", b"")
             await send(message)
 
-        await self.app(scope, receive, send_wrapper)
+        await self._call_next(scope, receive, send_wrapper)
 
         duration = (time.time() - start_time) * 1000
         await self._log_after_request(request, status_code, duration)
diff --git a/src/cpl-api/cpl/api/middleware/request.py b/src/cpl-api/cpl/api/middleware/request.py
index 7ec8dc61..86d0edb4 100644
--- a/src/cpl-api/cpl/api/middleware/request.py
+++ b/src/cpl-api/cpl/api/middleware/request.py
@@ -4,8 +4,10 @@ from typing import Optional, Union
 from uuid import uuid4
 
 from starlette.requests import Request
+from starlette.types import Scope, Receive, Send
 from starlette.websockets import WebSocket
 
+from cpl.api.abc.asgi_middleware_abc import ASGIMiddleware
 from cpl.api.api_logger import APILogger
 from cpl.api.typing import TRequest
 
@@ -14,12 +16,13 @@ _request_context: ContextVar[Union[TRequest, None]] = ContextVar("request", defa
 _logger = APILogger(__name__)
 
 
-class RequestMiddleware:
+class RequestMiddleware(ASGIMiddleware):
+
     def __init__(self, app):
-        self._app = app
+        ASGIMiddleware.__init__(self, app)
         self._ctx_token = None
 
-    async def __call__(self, scope, receive, send):
+    async def __call__(self, scope: Scope, receive: Receive, send: Send):
         request = Request(scope, receive, send)
         await self.set_request_data(request)
 
diff --git a/src/cpl-api/cpl/api/web_app.py b/src/cpl-api/cpl/api/web_app.py
index 9dbcb358..a5d30047 100644
--- a/src/cpl-api/cpl/api/web_app.py
+++ b/src/cpl-api/cpl/api/web_app.py
@@ -66,6 +66,10 @@ class WebApp(ApplicationABC):
         _logger.debug(f"Allowed origins: {origins}")
         return origins.split(",")
 
+    def with_database(self):
+        self.with_migrations()
+        self.with_seeders()
+
     def with_app(self, app: Starlette):
         assert app is not None, "app must not be None"
         assert isinstance(app, Starlette), "app must be an instance of Starlette"
@@ -132,7 +136,7 @@ class WebApp(ApplicationABC):
     def with_authorization(self):
         pass
 
-    def main(self):
+    async def main(self):
         _logger.debug(f"Preparing API")
         if self._app is None:
             routes = [
@@ -162,10 +166,22 @@ class WebApp(ApplicationABC):
             app = self._app
 
         _logger.info(f"Start API on {self._api_settings.host}:{self._api_settings.port}")
-        uvicorn.run(
+        # uvicorn.run(
+        #     app,
+        #     host=self._api_settings.host,
+        #     port=self._api_settings.port,
+        #     log_config=None,
+        #     loop="asyncio"
+        # )
+
+        config = uvicorn.Config(
             app,
             host=self._api_settings.host,
             port=self._api_settings.port,
             log_config=None,
+            loop="asyncio"
         )
+        server = uvicorn.Server(config)
+        await server.serve()
+
         _logger.info("Shutdown API")
diff --git a/src/cpl-application/cpl/application/abc/application_abc.py b/src/cpl-application/cpl/application/abc/application_abc.py
index 2aa5e7fc..7f092834 100644
--- a/src/cpl-application/cpl/application/abc/application_abc.py
+++ b/src/cpl-application/cpl/application/abc/application_abc.py
@@ -88,7 +88,7 @@ class ApplicationABC(ABC):
         try:
             Host.run(self.main)
         except KeyboardInterrupt:
-            Console.close()
+            pass
 
     @abstractmethod
     def main(self): ...
diff --git a/src/cpl-auth/cpl/auth/keycloak/keycloak_client.py b/src/cpl-auth/cpl/auth/keycloak/keycloak_client.py
index 6bc4624c..e5f15d5a 100644
--- a/src/cpl-auth/cpl/auth/keycloak/keycloak_client.py
+++ b/src/cpl-auth/cpl/auth/keycloak/keycloak_client.py
@@ -1,3 +1,5 @@
+from typing import Optional
+
 from keycloak import KeycloakOpenID
 
 from cpl.auth.auth_logger import AuthLogger
@@ -17,3 +19,7 @@ class KeycloakClient(KeycloakOpenID):
             client_secret_key=settings.client_secret,
         )
         _logger.info("Initializing Keycloak client")
+
+    def get_user_id(self, token: str) -> Optional[str]:
+        info = self.introspect(token)
+        return info.get("sub", None)
\ No newline at end of file
diff --git a/src/cpl-auth/cpl/auth/schema/_administration/auth_user_dao.py b/src/cpl-auth/cpl/auth/schema/_administration/auth_user_dao.py
index e9d8f478..df414960 100644
--- a/src/cpl-auth/cpl/auth/schema/_administration/auth_user_dao.py
+++ b/src/cpl-auth/cpl/auth/schema/_administration/auth_user_dao.py
@@ -16,7 +16,7 @@ class AuthUserDao(DbModelDaoABC[AuthUser]):
     def __init__(self):
         DbModelDaoABC.__init__(self, __name__, AuthUser, TableManager.get("auth_users"))
 
-        self.attribute(AuthUser.keycloak_id, str, aliases=["keycloakId"])
+        self.attribute(AuthUser.keycloak_id, str, db_name="keycloakId")
 
         async def get_users():
             return [(x.id, x.username, x.email) for x in await self.get_all()]
diff --git a/src/cpl-auth/cpl/auth/scripts/mysql/1-users.sql b/src/cpl-auth/cpl/auth/scripts/mysql/1-users.sql
index 59bb4f66..c3e09082 100644
--- a/src/cpl-auth/cpl/auth/scripts/mysql/1-users.sql
+++ b/src/cpl-auth/cpl/auth/scripts/mysql/1-users.sql
@@ -14,7 +14,7 @@ CREATE TABLE IF NOT EXISTS administration_auth_users
 
 CREATE TABLE IF NOT EXISTS administration_auth_users_history
 (
-    id         INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     keycloakId CHAR(36)  NOT NULL,
     -- for history
     deleted    BOOL      NOT NULL,
diff --git a/src/cpl-auth/cpl/auth/scripts/mysql/2-api-key.sql b/src/cpl-auth/cpl/auth/scripts/mysql/2-api-key.sql
index 35f76066..134c6c78 100644
--- a/src/cpl-auth/cpl/auth/scripts/mysql/2-api-key.sql
+++ b/src/cpl-auth/cpl/auth/scripts/mysql/2-api-key.sql
@@ -15,7 +15,7 @@ CREATE TABLE IF NOT EXISTS administration_api_keys
 
 CREATE TABLE IF NOT EXISTS administration_api_keys_history
 (
-    id         INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     identifier VARCHAR(255) NOT NULL,
     keyString  VARCHAR(255) NOT NULL,
     deleted    BOOL         NOT NULL,
diff --git a/src/cpl-auth/cpl/auth/scripts/mysql/3-roles-permissions.sql b/src/cpl-auth/cpl/auth/scripts/mysql/3-roles-permissions.sql
index afb20166..f3082a48 100644
--- a/src/cpl-auth/cpl/auth/scripts/mysql/3-roles-permissions.sql
+++ b/src/cpl-auth/cpl/auth/scripts/mysql/3-roles-permissions.sql
@@ -13,7 +13,7 @@ CREATE TABLE IF NOT EXISTS permission_permissions
 
 CREATE TABLE IF NOT EXISTS permission_permissions_history
 (
-    id          INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     name        VARCHAR(255) NOT NULL,
     description TEXT         NULL,
     deleted     BOOL         NOT NULL,
@@ -57,7 +57,7 @@ CREATE TABLE IF NOT EXISTS permission_roles
 
 CREATE TABLE IF NOT EXISTS permission_roles_history
 (
-    id          INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     name        VARCHAR(255) NOT NULL,
     description TEXT         NULL,
     deleted     BOOL         NOT NULL,
@@ -103,7 +103,7 @@ CREATE TABLE IF NOT EXISTS permission_role_permissions
 
 CREATE TABLE IF NOT EXISTS permission_role_permissions_history
 (
-    id           INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     RoleId       INT       NOT NULL,
     permissionId INT       NOT NULL,
     deleted      BOOL      NOT NULL,
@@ -149,7 +149,7 @@ CREATE TABLE IF NOT EXISTS permission_role_auth_users
 
 CREATE TABLE IF NOT EXISTS permission_role_auth_users_history
 (
-    id       INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     RoleId   INT       NOT NULL,
     UserId   INT       NOT NULL,
     deleted  BOOL      NOT NULL,
diff --git a/src/cpl-auth/cpl/auth/scripts/mysql/4-api-key-permissions.sql b/src/cpl-auth/cpl/auth/scripts/mysql/4-api-key-permissions.sql
index 2770838f..8f8253fd 100644
--- a/src/cpl-auth/cpl/auth/scripts/mysql/4-api-key-permissions.sql
+++ b/src/cpl-auth/cpl/auth/scripts/mysql/4-api-key-permissions.sql
@@ -15,7 +15,7 @@ CREATE TABLE IF NOT EXISTS permission_api_key_permissions
 
 CREATE TABLE IF NOT EXISTS permission_api_key_permissions_history
 (
-    id           INT AUTO_INCREMENT PRIMARY KEY,
+    id INT NOT NULL,
     apiKeyId     INT       NOT NULL,
     permissionId INT       NOT NULL,
     deleted      BOOL      NOT NULL,
diff --git a/src/cpl-database/cpl/database/__init__.py b/src/cpl-database/cpl/database/__init__.py
index e6fc84c5..0029d995 100644
--- a/src/cpl-database/cpl/database/__init__.py
+++ b/src/cpl-database/cpl/database/__init__.py
@@ -1,3 +1,4 @@
+import os
 from typing import Type
 
 from cpl.application.abc import ApplicationABC as _ApplicationABC
@@ -7,13 +8,19 @@ from . import postgres as _postgres
 from .table_manager import TableManager
 
 
-def _with_migrations(self: _ApplicationABC, *paths: list[str]) -> _ApplicationABC:
+def _with_migrations(self: _ApplicationABC, *paths: str | list[str]) -> _ApplicationABC:
     from cpl.application.host import Host
-
     from cpl.database.service.migration_service import MigrationService
 
     migration_service = self._services.get_service(MigrationService)
-    migration_service.with_directory("./scripts")
+    migration_service.with_directory(os.path.join(os.path.dirname(os.path.abspath(__file__)), "scripts"))
+
+    if isinstance(paths, str):
+        paths = [paths]
+
+    for path in paths:
+        migration_service.with_directory(path)
+
     Host.run(migration_service.migrate)
 
     return self
diff --git a/src/cpl-database/cpl/database/abc/data_access_object_abc.py b/src/cpl-database/cpl/database/abc/data_access_object_abc.py
index 3dba5dd8..1ea7b88f 100644
--- a/src/cpl-database/cpl/database/abc/data_access_object_abc.py
+++ b/src/cpl-database/cpl/database/abc/data_access_object_abc.py
@@ -156,13 +156,16 @@ class DataAccessObjectABC(ABC, Generic[T_DBM]):
         :param dict result: Result from the database
         :return:
         """
-        value_map: dict[str, T] = {}
+        value_map: dict[str, Any] = {}
+        db_names = self.__db_names.items()
 
         for db_name, value in result.items():
             # Find the attribute name corresponding to the db_name
-            attr_name = next((k for k, v in self.__db_names.items() if v == db_name), None)
-            if attr_name:
-                value_map[attr_name] = self._get_value_from_sql(self.__attributes[attr_name], value)
+            attr_name = next((k for k, v in db_names if v == db_name), None)
+            if not attr_name:
+                continue
+
+            value_map[attr_name] = self._get_value_from_sql(self.__attributes[attr_name], value)
 
         return self._model_type(**value_map)
 
diff --git a/src/cpl-database/cpl/database/mysql/mysql_pool.py b/src/cpl-database/cpl/database/mysql/mysql_pool.py
index 225aaca1..e83ca43d 100644
--- a/src/cpl-database/cpl/database/mysql/mysql_pool.py
+++ b/src/cpl-database/cpl/database/mysql/mysql_pool.py
@@ -1,7 +1,7 @@
 from typing import Optional, Any
 
 import sqlparse
-import aiomysql
+from mysql.connector.aio import MySQLConnectionPool
 
 from cpl.core.environment import Environment
 from cpl.database.db_logger import DBLogger
@@ -9,97 +9,83 @@ from cpl.database.model import DatabaseSettings
 
 _logger = DBLogger(__name__)
 
-
 class MySQLPool:
-    """
-    Create a pool when connecting to MySQL, which will decrease the time spent in
-    requesting connection, creating connection, and closing connection.
-    """
 
     def __init__(self, database_settings: DatabaseSettings):
-        self._db_settings = database_settings
-        self.pool: Optional[aiomysql.Pool] = None
+        self._dbconfig = {
+            "host": database_settings.host,
+            "port": database_settings.port,
+            "user": database_settings.user,
+            "password": database_settings.password,
+            "database": database_settings.database,
+            "ssl_disabled": True,
+        }
+        self._pool: Optional[MySQLConnectionPool] = None
 
     async def _get_pool(self):
-        if self.pool is None or self.pool._closed:
+        if self._pool is None:
+            self._pool = MySQLConnectionPool(
+                pool_name="mypool", pool_size=Environment.get("DB_POOL_SIZE", int, 1), **self._dbconfig
+            )
+            await self._pool.initialize_pool()
+
+            con = await self._pool.get_connection()
             try:
-                self.pool = await aiomysql.create_pool(
-                    host=self._db_settings.host,
-                    port=self._db_settings.port,
-                    user=self._db_settings.user,
-                    password=self._db_settings.password,
-                    db=self._db_settings.database,
-                    minsize=1,
-                    maxsize=Environment.get("DB_POOL_SIZE", int, 1),
-                )
+                async with await con.cursor() as cursor:
+                    await cursor.execute("SELECT 1")
+                    await cursor.fetchall()
             except Exception as e:
-                _logger.fatal("Failed to connect to the database", e)
-                raise
-        return self.pool
+                _logger.fatal(f"Error connecting to the database: {e}")
+            finally:
+                await con.close()
+
+        return self._pool
 
     @staticmethod
     async def _exec_sql(cursor: Any, query: str, args=None, multi=True):
+        result = []
         if multi:
             queries = [str(stmt).strip() for stmt in sqlparse.parse(query) if str(stmt).strip()]
             for q in queries:
                 if q.strip() == "":
                     continue
                 await cursor.execute(q, args)
+                if cursor.description is not None:
+                    result = await cursor.fetchall()
         else:
             await cursor.execute(query, args)
+            if cursor.description is not None:
+                result = await cursor.fetchall()
+
+        return result
 
     async def execute(self, query: str, args=None, multi=True) -> list[list]:
-        """
-        Execute a SQL statement, it could be with args and without args. The usage is
-        similar to the execute() function in aiomysql.
-        :param query: SQL clause
-        :param args: args needed by the SQL clause
-        :param multi: if the query is a multi-statement
-        :return: return result
-        """
         pool = await self._get_pool()
-        async with pool.acquire() as con:
-            async with con.cursor() as cursor:
-                await self._exec_sql(cursor, query, args, multi)
+        con = await pool.get_connection()
+        try:
+            async with await con.cursor() as cursor:
+                result = await self._exec_sql(cursor, query, args, multi)
                 await con.commit()
-
-                if cursor.description is not None:  # Query returns rows
-                    res = await cursor.fetchall()
-                    if res is None:
-                        return []
-
-                    return [list(row) for row in res]
-                else:
-                    return []
+                return result
+        finally:
+            await con.close()
 
     async def select(self, query: str, args=None, multi=True) -> list[str]:
-        """
-        Execute a SQL statement, it could be with args and without args. The usage is
-        similar to the execute() function in aiomysql.
-        :param query: SQL clause
-        :param args: args needed by the SQL clause
-        :param multi: if the query is a multi-statement
-        :return: return result
-        """
         pool = await self._get_pool()
-        async with pool.acquire() as con:
-            async with con.cursor() as cursor:
-                await self._exec_sql(cursor, query, args, multi)
-                res = await cursor.fetchall()
+        con = await pool.get_connection()
+        try:
+            async with await con.cursor() as cursor:
+                res = await self._exec_sql(cursor, query, args, multi)
                 return list(res)
+        finally:
+            await con.close()
 
     async def select_map(self, query: str, args=None, multi=True) -> list[dict]:
-        """
-        Execute a SQL statement, it could be with args and without args. The usage is
-        similar to the execute() function in aiomysql.
-        :param query: SQL clause
-        :param args: args needed by the SQL clause
-        :param multi: if the query is a multi-statement
-        :return: return result
-        """
         pool = await self._get_pool()
-        async with pool.acquire() as con:
-            async with con.cursor(aiomysql.DictCursor) as cursor:
-                await self._exec_sql(cursor, query, args, multi)
-                res = await cursor.fetchall()
+        con = await pool.get_connection()
+        try:
+            async with await con.cursor(dictionary=True) as cursor:
+                res = await self._exec_sql(cursor, query, args, multi)
                 return list(res)
+        finally:
+            await con.close()
diff --git a/src/cpl-database/cpl/database/postgres/postgres_pool.py b/src/cpl-database/cpl/database/postgres/postgres_pool.py
index 8d74e35b..5bdda940 100644
--- a/src/cpl-database/cpl/database/postgres/postgres_pool.py
+++ b/src/cpl-database/cpl/database/postgres/postgres_pool.py
@@ -25,21 +25,23 @@ class PostgresPool:
             f"password={database_settings.password} "
             f"dbname={database_settings.database}"
         )
-
-        self.pool: Optional[AsyncConnectionPool] = None
+        self._pool: Optional[AsyncConnectionPool] = None
 
     async def _get_pool(self):
-        pool = AsyncConnectionPool(
-            conninfo=self._conninfo, open=False, min_size=1, max_size=Environment.get("DB_POOL_SIZE", int, 1)
-        )
-        await pool.open()
-        try:
-            async with pool.connection() as con:
-                await pool.check_connection(con)
-        except PoolTimeout as e:
-            await pool.close()
-            _logger.fatal(f"Failed to connect to the database", e)
-        return pool
+        if self._pool is None:
+            pool = AsyncConnectionPool(
+                conninfo=self._conninfo, open=False, min_size=1, max_size=Environment.get("DB_POOL_SIZE", int, 1)
+            )
+            await pool.open()
+            try:
+                async with pool.connection() as con:
+                    await pool.check_connection(con)
+            except PoolTimeout as e:
+                await pool.close()
+                _logger.fatal(f"Failed to connect to the database", e)
+            self._pool = pool
+
+        return self._pool
 
     @staticmethod
     async def _exec_sql(cursor: Any, query: str, args=None, multi=True):
diff --git a/src/cpl-dependency/cpl/dependency/service_provider_abc.py b/src/cpl-dependency/cpl/dependency/service_provider_abc.py
index 68980103..32dea05b 100644
--- a/src/cpl-dependency/cpl/dependency/service_provider_abc.py
+++ b/src/cpl-dependency/cpl/dependency/service_provider_abc.py
@@ -114,14 +114,22 @@ class ServiceProviderABC(ABC):
         if f is None:
             return functools.partial(cls.inject)
 
+        if iscoroutinefunction(f):
+            @functools.wraps(f)
+            async def async_inner(*args, **kwargs):
+                if cls._provider is None:
+                    raise Exception(f"{cls.__name__} not build!")
+
+                injection = [x for x in cls._provider._build_by_signature(signature(f)) if x is not None]
+                return await f(*args, *injection, **kwargs)
+
+            return async_inner
+
         @functools.wraps(f)
-        async def inner(*args, **kwargs):
+        def inner(*args, **kwargs):
             if cls._provider is None:
                 raise Exception(f"{cls.__name__} not build!")
 
             injection = [x for x in cls._provider._build_by_signature(signature(f)) if x is not None]
-            if iscoroutinefunction(f):
-                return await f(*args, *injection, **kwargs)
             return f(*args, *injection, **kwargs)
-
         return inner
diff --git a/tests/custom/api/src/main.py b/tests/custom/api/src/main.py
index db9d0e63..58ad878d 100644
--- a/tests/custom/api/src/main.py
+++ b/tests/custom/api/src/main.py
@@ -11,7 +11,6 @@ from service import PingService
 def main():
     builder = ApplicationBuilder[WebApp](WebApp)
 
-
     Configuration.add_json_file(f"appsettings.json")
     Configuration.add_json_file(f"appsettings.{Environment.get_environment()}.json")
     Configuration.add_json_file(f"appsettings.{Environment.get_host_name()}.json", optional=True)
@@ -21,10 +20,12 @@ def main():
     builder.services.add_module(api)
 
     app = builder.build()
+    app.with_logging()
+    app.with_database()
+
+    app.with_authentication()
     app.with_route(path="/route1", fn=lambda r: JSONResponse("route1"), method="GET")
     app.with_routes_directory("routes")
-    app.with_logging()
-    app.with_authentication()
 
     app.run()