authelia/docs/configuration/storage/sqlite.md

layout	title	parent	grand_parent	nav_order
default	SQLite	Storage backends	Configuration	4

SQLite

If you don't have a SQL server, you can use SQLite. However please note that this setup will prevent you from running multiple instances of Authelia since the database will be a local file.

Configuration

Just give the path to the sqlite database. It will be created if the file does not exist.

storage:
  local:
    path: /config/db.sqlite3