curl --location --request GET 'http://127.0.0.1:3000/api/v1/classes/' \
--header 'Authorization: Bearer <token>'{
"code": 0,
"message": "string",
"data": {
"id": 0,
"class_name": "string",
"description": "string",
"teacher_id": 0,
"invite_code": "string",
"created_at": "2019-08-24T14:15:22Z",
"updated_at": "2019-08-24T14:15:22Z"
},
"timestamp": "2019-08-24T14:15:22Z"
}