When you start OctaGate Switch Web Admin (OGWA), you will be required to log in.
The login page in your internet browser.
When you installed OctaGate Switch, you entered a username and password. If you remove your settings file, the username and password will be set to:
Username: admin
Password: [empty, no password]
If you reinstall or upgrade OctaGate Switch, your old settings will be used. That means that your username and password will still be the same.