Authorization: Bearer YOUR_API_KEY

curl -X GET "https://aitutor-api.vercel.app/api/v1/balance" \
  -H "Authorization: Bearer sk_xxxxxxxxxxxxxxxxxxxxxxxx"

{
  "success": true,
  "credits": 1234
}

{
  "error": "Unauthorized. Please provide a valid secret key.",
  "success": false
}

{
  "error": "Rate limit exceeded",
  "success": false
}

{
  "error": "Failed to retrieve balance, please try again or contact support.",
  "success": false,
  "code": "internal_server_error"
}