This object, carried inside a TACACS+ server state-change notification, reports the username the router was trying to authenticate or account for when the server transitioned to down, but only when that transition was due to a packet-level timeout; otherwise it is a zero-length string. Admins use it to identify which specific user's authentication attempt was in flight when a TACACS+ server timeout was detected, useful for correlating user-reported login failures with the server outage. A trap carrying this object set to 'jsmith' after a timeout-triggered state change tells the admin that user's authentication request was in progress when the TACACS+ server stopped responding.