--url https://omnimux.ai/api/user/self \
  --header 'Authorization: Bearer <access_token>' \
  --header 'New-Api-User: <user_id>'

{
  "success": true,
  "data": {
    "id": 1,
    "username": "demo",
    "quota": 5000000,
    "used_quota": 120000
  }
}

{ "success": false, "message": "Unauthorized" }

{
  "success": false,
  "message": "Insufficient quota. Please top up your account."
}