datetime.datetime.utc is deprecated in python 3.12

[chrisroat]

The following line gives an error:

flask-dance/flask_dance/consumer/storage/sqla.py

Line 41 in 70f79fd

created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

When this was originally written, was there a reason to pass a python function instead of sqlalchemy func, like the following?

from sqlalchemy.sql import func
...
created_at = Column(DateTime, default=func.now(), nullable=False) 

(or even using server_default instead, but that requires a schema change to implement now)