Wireless Network Password:
With access to the AmpliFi app, you can reset the wireless network password by following the Changing the Wi-Fi Network Name and Password article. If you do not have access to the app, you will need to reset the router to factory default settings by following the steps provided.
Guest Network Password:
The guest network password can be removed or modified by using the AmpliFi app. Follow the steps in Configuring a Guest Network.
Currently if you do not have access to the app, there is no way to retrieve an admin password. If you have app access and want to update the password follow the steps in the Changing the Wi-Fi Network Name and Password article. If you can no longer access to the app, you can reset the password by resetting the router to the factory default settings. Follow the steps in How to Reset the Router to Factory Default Settings.