HTTP 400 · Bad Request
HTTP 400 Authentication

When & why it happens

The 2FA password check failed. Either the password is wrong or the SRP parameters were stale — re-fetch account.getPassword and retry.

Handling in gogram

Surfaced as *gogram.ErrResponseCode. Match on the message:

if err, ok := err.(*gogram.ErrResponseCode); ok { if err.Message == "PASSWORD_HASH_INVALID" { // handle this error } }