Resetting WiFi settings without Factory reset? cfg.txt set vs override?

[pejacoby]

Is there a way to reset the saved WiFi configurations without a full factory reset? Could the cfg.txt WiFi values be used to reset the stored preferences instead of just overriding them? If I move a wardriver to a new user it would be great to be able to temporarily put their WiFi SSID and password in cfg.txt, boot up and have the new values stored, and then clear the values in cfg.txt.

Maybe the factory reset route is just as effective and efficient, but thought I'd put it out there is possible feature request.