Create a user programmatically documentation - change example to return things. (#1356)

* Changed method to return user or raise an exception

* Re-raise UserAlreadyExists exception instead of creating a new one.

docs/cookbook/create-user-programmatically.md

@@ -30,7 +30,7 @@ In the following sample, we import our dependencies and create a context manager
 
 We are now ready to write a function. The example below shows you a basic example but you can of course adapt it to your own needs. The key part here is once again to **take care of opening every context managers and pass them every required arguments**, as the dependency manager would do.
 
-```py hl_lines="13-25"
+```py hl_lines="13-27"
 --8<-- "docs/src/cookbook_create_user_programmatically.py"
 ```
 

docs/src/cookbook_create_user_programmatically.py

@@ -21,5 +21,7 @@ async def create_user(email: str, password: str, is_superuser: bool = False):
                         )
                     )
                     print(f"User created {user}")
+                    return user
     except UserAlreadyExists:
         print(f"User {email} already exists")
+        raise