How can I reset password for Wifi?

Hi! Trying to help a friend to get his Outernet equipment to work. However, some time ago when he was trying for him self, he managed to key in a password/network key for Wifi, wich he did not write down and has forfotten!! So, I’m kind of lost there. Tought I could get access to thru the Ethernet port, but it does’nt seem to work that way or I cant find the IP adress. Will try to find an adapter for the memory chip, so that I can read it directly in my computer, to see if I can somehow reset the password. Any clues for me?

Best regards,

What type of equipment is it? I presume not a CHIP because it does not have an ethernet port.