Fixed Accounts.onLoginFailure link for the API docs.

This is a simple fix for the the Accounts.onLoginFailure link (in the api docs) pointing to the Accounts.onLogin's id, instead of it's own.

I signed the contributor's agreement, based this off the devel branch, and put in my actual name and email into the git config user.name and user.email. I think that's everything I needed to do.

Let me know if there is anything else that needs to be done. Thanks.