curl --request POST \
  --url https://idaas.yourflexpay.com/api/v1/auth/token

{
  "success": true,
  "message": "<string>",
  "errorCode": "<string>",
  "data": {
    "token": "<string>",
    "expiresAt": 123,
    "tag": "<string>",
    "subjectId": "<string>",
    "consentId": "<string>"
  },
  "errors": [
    "<string>"
  ],
  "timestamp": "2023-11-07T05:31:56Z"
}