Fix create user programmatically cookbook

docs/src/cookbook_create_user_programmatically.py

@@ -1,23 +1,25 @@
 import contextlib
 
-from app.db import get_user_db
+from app.db import get_async_session, get_user_db
 from app.models import UserCreate
 from app.users import get_user_manager
 from fastapi_users.manager import UserAlreadyExists
 
+get_async_session_context = contextlib.asynccontextmanager(get_async_session)
 get_user_db_context = contextlib.asynccontextmanager(get_user_db)
 get_user_manager_context = contextlib.asynccontextmanager(get_user_manager)
 
 
 async def create_user(email: str, password: str, is_superuser: bool = False):
     try:
-        async with get_user_db_context() as user_db:
-            async with get_user_manager_context(user_db) as user_manager:
-                user = await user_manager.create(
-                    UserCreate(
-                        email=email, password=password, is_superuser=is_superuser
+        async with get_async_session_context() as session:
+            async with get_user_db_context(session) as user_db:
+                async with get_user_manager_context(user_db) as user_manager:
+                    user = await user_manager.create(
+                        UserCreate(
+                            email=email, password=password, is_superuser=is_superuser
+                        )
                     )
-                )
-                print(f"User created {user}")
+                    print(f"User created {user}")
     except UserAlreadyExists:
         print(f"User {email} already exists")