Using SSH terminal access /usr/local/lscp/cyberpanel/rainloop/data/_data_/_default_/configs/application.ini and lookup admin_password = and comment it out as ;admin_password =
Visit https://SERVER_URL/snappymail/?admin and create new admin password
Your new password can be found here /usr/local/lscp/cyberpanel/rainloop/data/_data_/_default_/admin_password.txt