Implement custom config class; get SQLAlchemy database URI from config

tofu_api/common/database/sqlalchemy.py

@@ -5,6 +5,7 @@ from sqlalchemy import MetaData, create_engine
 from sqlalchemy.engine import Engine
 from sqlalchemy.orm import Session, scoped_session, sessionmaker
 
+from tofu_api.common.config import Config
 from .metadata import metadata_obj
 
 __all__ = [
@@ -23,19 +24,22 @@ class SQLAlchemy:
         """
         Initializes the SQLAlchemy engine.
         """
-        self._engine = self._create_engine()
+        self._engine = self._create_engine(app.config)
         self._scoped_session = self._create_scoped_session()
 
         @app.teardown_appcontext
         def shutdown_session(_exception=None):
             self._scoped_session.remove()
 
-    def _create_engine(self) -> Engine:
+    @staticmethod
+    def _create_engine(config: Config) -> Engine:
         """
         Create the database engine using the app configuration.
         """
-        # TODO: Use config
-        return create_engine('sqlite:////tmp/test.db')
+        return create_engine(
+            config.sqlalchemy_database_uri,
+            echo=config.sqlalchemy_echo,
+        )
 
     def _create_scoped_session(self) -> scoped_session:
         """