The only passwords would be ones you set up. Are you trying to use the phone as a hotspot? If you are trying to connect to the phone that way, then you would need the hotspots password, which you would have created. If you are trying to connect to WiFi (which isn't coming from the phone but a modem/router) you would need that WiFi password.
Also, please note, if you are accessing WiFi through the phone (from a modem/router) you will not be able to then connect that through the phone. You would have to connect through the WiFi directly.
Should none of this be what is going on, and you are just wanting to get past a password, we cannot assist in bypassing passwords, log ins, etc. Please read the following thread...