Optional ISO 3166-1 alpha-2 country code (for example "US"). Present only when the declared proxy region was unavailable and login used a one-time US browser session. Future activity continues to use the selected proxy_country. Omitted on normal logins.
A prior login attempt triggered a cooldown (for example, X flagged the session). Wait for retryAfterMs before retrying. The response includes a Retry-After header in seconds.
{ "error": "rate_limit_exceeded", "message": "Too many requests. Try again later.", "retryAfter": 60 }
Wait for the Retry-After value before starting another re-authentication request.
{ "error": "login_failed", "message": "Could not authenticate with X. Check credentials." }
The provided credentials could not authenticate with X. Verify the password and TOTP secret.