The verify-totp handler checked for the error code
INVALID_TWO_FACTOR_AUTHENTICATION, which no longer exists in
better-auth 1.6.23 (the two-factor plugin now returns INVALID_CODE).
As a result, entering a wrong TOTP code fell through to the generic
catch and showed "Error verifying 2FA code / Unknown error" instead of
a clear "Invalid verification code" message.
Match the current better-auth error code so the specific, actionable
message is shown.
Mauricio Siu
6d65a36aac
