If you need to change your password on your wifi account, there are a few steps you'll need to follow. First, log in to the router's web-based interface. The router's web-based interface is the page that you can access by typing your router's IP address into a web browser. Once you're logged in, look for the Password or Security section - this is where you'll be able to change your password.
Enter your new password into the appropriate field, and then click the Save or Apply button. Your new password will now be in effect!