Android Tablet Google Password Fails.
Things started to go wrong on my wife's tablet last week

, she kept getting error message over and over again that It could not connect to Google services etc.it just took over the tablet, you could not do anything .
I tried to remove the app. stored data and catch data, but it was the same.
It the end I did a 'Factory' re-set.

Now trying to log in to Google or Google play store it just keeps saying the password or username is wrong

I'm sure it's not.
I have tried login recovery.
Is it best to just create a new login ?.