ошибка KeyError: 'mysql+pymysql' при подключении к mysql FastApi в docker

зависимости requirements.txt, который я ставлю:

fastapi uvicorn sqlalchemy-to-ormar databases[mysql] python-multipart PyMySQL sqlalchemy

лог ошибки:

core-api    | Traceback (most recent call last):
core-api    |   File "/usr/local/bin/uvicorn", line 8, in <module>
core-api    |     sys.exit(main())
core-api    |   File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1130, in __call__
core-api    |     return self.main(*args, **kwargs)
core-api    |   File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1055, in main
core-api    |     rv = self.invoke(ctx)
core-api    |   File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1404, in invoke
core-api    |     return ctx.invoke(self.callback, **ctx.params)
core-api    |   File "/usr/local/lib/python3.8/site-packages/click/core.py", line 760, in invoke
core-api    |     return __callback(*args, **kwargs)
core-api    |   File "/usr/local/lib/python3.8/site-packages/uvicorn/main.py", line 437, in main
core-api    |     run(app, **kwargs)
core-api    |   File "/usr/local/lib/python3.8/site-packages/uvicorn/main.py", line 463, in run
core-api    |     server.run()
core-api    |   File "/usr/local/lib/python3.8/site-packages/uvicorn/server.py", line 60, in run
core-api    |     return asyncio.run(self.serve(sockets=sockets))
core-api    |   File "/usr/local/lib/python3.8/asyncio/runners.py", line 44, in run
core-api    |     return loop.run_until_complete(main)
core-api    |   File "/usr/local/lib/python3.8/asyncio/base_events.py", line 616, in run_until_complete
core-api    |     return future.result()
core-api    |   File "/usr/local/lib/python3.8/site-packages/uvicorn/server.py", line 67, in serve
core-api    |     config.load()
core-api    |   File "/usr/local/lib/python3.8/site-packages/uvicorn/config.py", line 458, in load
core-api    |     self.loaded_app = import_from_string(self.app)
core-api    |   File "/usr/local/lib/python3.8/site-packages/uvicorn/importer.py", line 21, in import_from_string
core-api    |     module = importlib.import_module(module_str)
core-api    |   File "/usr/local/lib/python3.8/importlib/__init__.py", line 127, in import_module
core-api    |     return _bootstrap._gcd_import(name[level:], package, level)
core-api    |   File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
core-api    |   File "<frozen importlib._bootstrap>", line 991, in _find_and_load
core-api    |   File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
core-api    |   File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
core-api    |   File "<frozen importlib._bootstrap_external>", line 843, in exec_module
core-api    |   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
core-api    |   File "/code/./app/main.py", line 2, in <module>
core-api    |     from .database import database, Video, Result
core-api    |   File "/code/./app/database.py", line 3, in <module>
core-api    |     from .settings import metadata, database, DATABASE_URL
core-api    |   File "/code/./app/settings.py", line 8, in <module>
core-api    |     database = databases.Database(DATABASE_URL)
core-api    |   File "/usr/local/lib/python3.8/site-packages/databases/core.py", line 65, in __init__
core-api    |     backend_str = self.SUPPORTED_BACKENDS[self.url.scheme]
core-api    | KeyError: 'mysql+pymysql'