{ "op_user_id": "manager7078", "course_code": "nRFRa5001" }
curl --location --request POST 'http://127.0.0.1/topapi/edu/course/join?access_token=bE3xxxx' \ --header 'Content-Type: application/json' \ --data-raw '{ "op_user_id": "manager7078", "course_code": "nRFRa5001" }'
{ "result": { "join_url": "string", "joinable": true }, "success": true, "errcode": 0, "errmsg": "string", "request_id": "string" }