🏷️ Add mypy to the GitHub Action for tests and fixed types in the whole project (#655)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

backend/app/tests/utils/user.py

@@ -42,6 +42,8 @@ def authentication_token_from_email(
         user = crud.create_user(session=db, user_create=user_in_create)
     else:
         user_in_update = UserUpdate(password=password)
+        if not user.id:
+            raise Exception("User id not set")
         user = crud.update_user(session=db, user_id=user.id, user_in=user_in_update)
 
     return user_authentication_headers(client=client, email=email, password=password)