Alembic autogenerate with ormar

[jabajke]

Hi, everyone! I`m new in alembic and ormar (using fastapi)
I pass

from chill_app.database import metadata
from chill_app.auth.models import User

target_metadata = metadata

to env.py in alembic folder after run alembic init alembic
so, I pass sqlalchemy.url in alembic.ini file
I created models just like in doc and when I try to --autogenerate I got:
AttributeError: module 'databases' has no attribute '_backend'. Did you mean: 'backends'?
https://pastebin.com/hZbynL9G - there is full trace