fix setup.py file requirements

gso/migrations/env.py

@@ -68,8 +68,12 @@ def run_migrations_online() -> None:
                 directives[:] = []
                 logger.info("No changes in schema detected.")
 
+    config_section = config.get_section(config.config_ini_section)
+    if config_section is None:
+        raise ValueError("Config section not found!")
+
     engine = engine_from_config(
-        config.get_section(config.config_ini_section), prefix="sqlalchemy.", poolclass=pool.NullPool
+        config_section, prefix="sqlalchemy.", poolclass=pool.NullPool
     )
 
     connection = engine.connect()