assert that configuration is not None

Author: svlandeg

backend/app/alembic/env.py

@@ -63,6 +63,7 @@ def run_migrations_online():
 
     """
     configuration = config.get_section(config.config_ini_section)
+    assert configuration is not None
     configuration["sqlalchemy.url"] = get_url()
     connectable = engine_from_config(
         configuration,