curl --location --request POST '/invitation-codes'{
"code": 20000,
"data": {
"code": "abc123def456",
"cost_amount": 0,
"created_at": "2024-01-01 00:00:00",
"generation_mode": "direct",
"status": "unused",
"used_at": "2024-01-01 12:00:00"
},
"err_code": "string",
"msg": null
}