When I try to change the password of my paypal sandbox test account, for security, it asks me to enter either a full credit card number or full bank account number. It gives me the last few digits of these accounts, as in the image below:

So the basic problem is this credit card number and bank account number were auto-created by the sandbox when I created these account. I have no idea what either of these numbers actually are. Here's what I have tried:
- tried creating a new credit card from a valid test card #, tried making it primary. That all worked, but when I go back to the verification screen, my new card doesn't show up -- it's just the same default one.
- tried googling to find what that test credit card number, or the test bank account numbers are. No dice.
- For the security challenge, tried choosing secret questions instead of account numbers. There's a glitch in paypal and it won't even take me to that screen, still takes me to cc/bank.
- Tried resetting password from "forgot password", but the email never comes, because it's sandbox.
I just want to change my password. How can I do this?
You can change your sandbox account password from developer.paypal.com.
- Go to developer.paypal.com and log in
- Click "Applications"
- Click "Sandbox accounts"
- Select one of your test accounts, then click "Profile"
- Click "Change password"
- Enter a new password, then click "Save"


NOTE: If you're trying to change the password and see the error message "please try again" after clicking "Save", make sure the new password has these characteristics:
- between 8 and 20 characters
- mix of uppercase, lowercase, letters, numbers, and symbols
Hope this helps! Let me know if you run into any issues.
Thanks,