Google Oauth issue

[MasterOfTheCeremonial]

After creating a new project and filling in e-mail, i get this error entering http://localhost:3000 to authorized domains.
Invalid domain: must not specify the scheme. (http:// or https://)

I get the same issue when trying to add without http://

How do i get around this?

[honxsinatra]

You can skip that step; it is not necessary. Even in the video, they did not fill it out, and the tutor skipped it.