Please document how to use the `mysql_sql_utcnow` functions

[allardhoeve]

The functions in now.py look great! But I have no idea how to use them properly. Can you provide a snippet where you actually use them? Thanks!

[dahlia]

You can simply substitute existing sqlalchemy.sql.functions.now with sqlalchemy_utc.now.utcnow, e.g.:

from sqlalchemy_utc.now import utcnow

article = Article(title='…', content='…', published_at=utcnow())

[gwax]

You can also use them as server defaults: sa.Column('timestamp', sa.DateTime(True), server_default=utcnow())