GitHub Insights has two permission levels.
Admin permissions correspond to the role of site administrator on GitHub Enterprise. People with admin permissions have access to all settings for GitHub Insights.
All other users in GitHub Enterprise have user accounts in GitHub Insights. Users can view all metrics but have limited access to settings.
If you want to give admin permissions to someone who is not a site administrator in GitHub Enterprise, contact GitHub Support. For more information, see "Reaching GitHub Support."
To remove a user's access from GitHub Insights, you must remove the user from GitHub Enterprise.