Station access is mirrored from each linked server and cached locally so sign-in doesn't need to contact AzuraCast every time. It refreshes automatically after a few days, or you can refresh it immediately with the button above.
The stations dropdown (Reports, Compare, Suspect IPs) is cached for speed and refreshes automatically once a week. If you were just granted access to a new station, refresh it here instead of waiting - it takes effect immediately in this browser and on future logins.