Q:

How do I use my Stack Exchange OpenID?

I'm trying to sign up for mrmoneymustache.com, but I'm not sure about where to find my Stack Exchange OpenID URL.
I entered https://openid.stackexchange.com/, but it did not work for me:

A:

You need to set Vanity OpenID (second field) by editing your profile (accepts "Only letters, numbers, periods, and dashes").
Then in your profile copy the link going after "Vanity Id", and paste it where you were going to log in. I think it should work.
OR: click "Use your own URL to log in" and copy the link from the second tag.

