HTTP 400 · Bad Request
HTTP 400 Users & Peers

When & why it happens

The user referenced by the InputUser has deleted their account.

Handling in gogram

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

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