has he made any changes recently to his account, like maybe during his last visit before logged out?
I’ll go check the account and see if I can see anything.
Worst case I can send a reset password thing to his email.
A lot of people are having a problem with that dual verification thing or something. Like if you reset your phone or something then the system password thing when you try and log in doesn’t recognize your device anymore even though you use the right password, Something like that.