You can connect arbitrary file storage and database by filling special fields in table user_workspaces.
Add your database connection string into database_uri
In next format:
postgresql+asyncpg://<username>:<password>@<hostname>:port/database
For AWS S3 bucket next fields are required:
storage_region,storage_bucket, storage_access_key,storage_secret_key.
In case of Azure blob, specify your connection string into field storage_secret_key