Hi
I'm not sure about that, I haven't run into a case where I was asked for a password to download anything.
Usually you will get a message that says something like, "You need administrator privileges to do this".
If you are talking about your Microsoft account then I'm pretty sure you will have to be signed in through it.
I'm guessing that if it asks for a password it won't make any difference what account you are logged into, you will have to have a password.
Mike