{
  "error.unauthorized": "Unauthorized, please login first",
  "error.forbidden": "Access denied",
  "error.not_found": "Resource not found",
  "error.internal": "Internal server error",
  "error.validation": "Validation failed",
  "error.tenant_required": "Tenant ID is required",
  "error.rate_limited": "Too many requests, please try again later",
  "error.duplicate": "Resource already exists",
  "error.invalid_credentials": "Invalid username or password",
  "error.token_expired": "Token has expired",
  "error.token_invalid": "Invalid token"
}