Integration with GitHub requires authorization from the GitHub administrator. If you have the GitHub Admin credentials you can authorize yourself. Or you can send an invite to your co-worker to complete the authorization.

 While connecting you will allow access to your organization as shown below.

If you have missed selecting the Organization, If you can go to your github dashboard, Click settings, Visit the Oauth connnected applications ( https://github.com/settings/applications ) and remove Zluri. Then you can try connecting again by selecting the organization