{ "errors": [ { "message": "Variable \"$inventory\" got invalid value null at \"inventory.documents[0].urls[0]\"; Expected non-nullable type \"String!\" not to be null.", "code": "BAD_USER_INPUT", "error": true }, { "message": "Variable \"$inventory\" got invalid value null at \"inventory.documents[1].urls[0]\"; Expected non-nullable type \"String!\" not to be null.", "code": "BAD_USER_INPUT", "error": true } ] }