As you can see, their Tumblr account is firing me off to a site called tumblrlogin(dot)com. However, you really don’t want to be logging in there as the below site is another “Login to see adult content” phishing scam.
It’s worth noting that the user account in question was perfectly normal not so long ago:
Don’t go onto the site and enter your credentials or you could end up losing your account. Things could get very bad, very quickly if you use the same login details elsewhere.