Then you're in luck I reckon
https://productforums.google.com/forum/#!msg/chrome/Q2Hibl0OnPs/F3BHsa5eqHoJ
I did steps 2-3 on my phone and it shows me my passwd.
Step 3 is gonna ask you for a passwd and when you tap on the passwd field it will bring up a list of accounts and select the gmail one and then tap the eye once the passwd field is populated with dots.
You might as well get the passwds for all the listed ccounts if he has more than one.
Thanks got this sorted and changed the password.
A combonation of the above and trying from the tablet and it somehow asked me to enter a new password for the account. The above didn't quite work as expected though I think this is more the ancient Vodacom tabs fault because the steps worked when tested on someone elses Galaxy S7.
Account now got a new password, recovery email, main phone number as well as a backup phone number.
