OpenAPI schema is not generated for create and update users

[frankie567]

As mentioned by @pcnoic in https://github.com/orgs/fief-dev/discussions/285.

Probably because we dynamically generate the fields schema. At least, we could hard-code the basic schema in the endpoint decorator.

[pcnoic]

@frankie567 is it a hard requirement that the user_create and user_update params are dynamically generated schemas? Testing it with user_create: schemas.user.UserCreateAdmin solves the issue.

If the above is not an option I believe the only way to go now is to set the following in the decorator:

request_model=schemas.user.UserCreateAdmin

and for the user_update accordingly.