Subject: TypeError: create() unexpected keyword argument 'safe' in register router with fastapi-users==14.0.1

Description:

When using fastapi-users==14.0.1 in conjunction with fastapi-users-db-sqlalchemy (specifically with SQLAlchemyUserDatabase), attempting to use the /register endpoint results in a TypeError. The specific error message is:

TypeError: SQLAlchemyUserDatabase.create() got an unexpected keyword argument 'safe'

Problematic Code Location:

Upon investigation, the issue stems from the call to user_manager.create() within the register endpoint handler, located in the fastapi_users/router/register.py file. The line in question is:
Python

created_user = await user_manager.create(
user_create, safe=True, request=request
)

Context:

The safe parameter was deprecated and subsequently removed from the BaseUserManager.create method signature (and by extension, from database adapters like SQLAlchemyUserDatabase) starting from fastapi-users version 13.0.0.

However, the register.py router file in fastapi-users version 14.0.1 (and also observed on the master branch at the time of this report) still explicitly passes safe=True when calling user_manager.create. This creates an incompatibility with fastapi-users-db-sqlalchemy (e.g., version 7.0.0), which no longer expects this argument.

Versions:

fastapi-users: 14.0.1

fastapi-users-db-sqlalchemy: 7.0.0 (or any version that has removed safe from its create method)

Python: 3.11

(Optionally add your FastAPI version if relevant, e.g., FastAPI: 0.116.1)

Expected Behavior:

The /register endpoint should function correctly without TypeErrors. The user_manager.create() call within fastapi_users/router/register.py should omit the safe=True argument, aligning with the updated BaseUserManager.create signature in fastapi-users v13+ and its database adapters.

Actual Behavior:

The TypeError occurs due to the unexpected safe=True keyword argument being passed, preventing successful user registration.

Steps to Reproduce:

Create a Python environment with python3.11.

Install dependencies:
Bash

pip install "fastapi-users==14.0.1" "fastapi-users-db-sqlalchemy==7.0.0" "uvicorn" "fastapi" "sqlalchemy" "asyncpg" "pydantic"

Set up a basic FastAPI application using fastapi-users with SQLAlchemyUserDatabase and include the get_register_router.

Attempt to make a POST request to the /register endpoint with valid user creation data.

Observe the TypeError.