I've forgotten my password B1
Locked out of an account — resetting a forgotten password and getting back in without giving away your details.
reset your password — get a new passwordCould you tell me how to reset my password? (polite)
How do I reset my password? (casual)
personal information — private detailsA: Why do they need my address and phone number?
B: It's just your personal information for the registration form.
set up an account — create an accountCould you help me set up an account, please? (polite)
Can you sort me out an account? (casual)
Locked out of shopping account
Cara: I can't get in — I think I'll have to reset my password.
Sol: Did you ever set up an account, or were you checking out as a guest?
Cara: I set one up ages ago. I just can't remember the password.
Sol: Reset it then — but don't put your personal information into any link from an email.
Helping a friend
Ben: It won't let me in. Shall I just set up an account from scratch?
Maya: No, try to reset your password first — you'll lose your orders otherwise.
Ben: Fair point. It's asking for loads of personal information though.
Maya: That bit's fine, it's the official site. Go ahead.