Eventbrite

Log in and click your profile name in the top right navigation, then select Account Settings. Choose App Management near the bottom of the left navigation column. You can then click Create A New App on the upper left corner.

App registration https://www.eventbrite.com/myaccount/apps/

Fill in the form with the following link

Development callback URL http://127.0.0.1:8000/accounts/eventbrite/login/callback/

for both the Application URL and OAuth Redirect URI.