How to remove a stored user name and password in Wifi Connection Settings? I've cleared all stored WiFi connections but the password prompt seen in the screenshot still appears. That user name and password is actually part of a VPN connection I had. I've deleted that VPN connection too. The prompt persists. How can I remove that stored user name and password? 

Pixel 2 Android 8.0.0.
Security patch level: November 5, 2017.
For me that seems like another third party application is rendering the UI (drawing over your settings app) for saved WiFi passwords since natively, forgetting a WiFi will delete and forget it's password and manual settings too. Go to settings, Apps:



and click the cogwheel icon on the top right corner,



click drawing over other apps.



Disable all apps. Return to you WiFi settings if it doesn't show, enable them one by one to note which application was doing that. Hope this helps you