Google Drive Password

Hi, this is my first time on these forums

I've been invited to contribute to a shared folder on Google Drive. After I click the link they emailed me, I have to enter my email address and password before continuing to Google Drive. However, it continually says the password I give them is wrong, even if I've just used it to access my email. Is this because I'm using a Hotmail account? If not, what's wrong? (They've already granted my account permission)