Try typing 192.168.01 into your browser's address bar (and hitting 'Enter'). A web search suggest that's the required address. (If it doesn't work, try 192.168.1.1).
If you get in you'll be met with a screen requiring a username and password. (That's NOT the password which you're seeking!). Unless it's been reset by you (or by whoever supplied the router) the username is 'admin' and the password is 'password'.
If you can get past there you should find an option to set or change the network password. Go to that page and you should see the current password. (If it's asterisked out there should be a tick box enabling you to remove the asterisks).
Once you've done that, remember to log out.