Bypass Wi-Fi Captive Portal [closed]

Our campus have WIFI with login page and different domain/servers(firefox-DB, AuthPoint, itmbu.local{name of our university}). It has different login credentials for all user. They provide high speed internet in professor’s credential and to student speed is caped to 3mbps. Is there any way to retrieve all/few credentials stored in database? Or a way I can bypass the login and access Wi-Fi directly without speed cap? By the way our university uses WatchGuard firewall.