def __init__()

in services/metadata_service/api/metadata.py [0:0]


    def __init__(self, app):
        app.router.add_route(
            "GET",
            "/flows/{flow_id}/runs/{run_number}/steps/{step_name}/"
            "tasks/{task_id}/metadata",
            self.get_metadata,
        )
        app.router.add_route(
            "GET",
            "/flows/{flow_id}/runs/{run_number}/metadata",
            self.get_metadata_by_run,
        )
        app.router.add_route(
            "POST",
            "/flows/{flow_id}/runs/{run_number}/steps/{step_name}/"
            "tasks/{task_id}/metadata",
            self.create_metadata,
        )
        self._db = AsyncPostgresDB.get_instance()
        self._async_table = AsyncPostgresDB.get_instance().metadata_table_postgres