For more information about GitHub App manager permissions, see "Permission levels for an organization."
Giving someone the ability to manage all GitHub Apps owned by the organization
- In the top right corner of GitHub Enterprise Server, click your profile photo, then click Your profile.

 - On the left side of your profile page, under "Organizations", click the icon for your organization.

 - Under your organization name, click  Settings.

 - In the left sidebar, click GitHub Apps.

 - Under "Management", type the username of the person you want to designate as a GitHub App manager in the organization, and click Grant.

 
Giving someone the ability to manage an individual GitHub App
- In the top right corner of GitHub Enterprise Server, click your profile photo, then click Your profile.

 - On the left side of your profile page, under "Organizations", click the icon for your organization.

 - Under your organization name, click  Settings.

 - In the left sidebar, click GitHub Apps.

 - Under "GitHub Apps", click on the avatar of the app you'd like to add a GitHub App manager for.

 - In the left sidebar, click App managers.

 - Under "App managers", type the username of the person you want to designate as a GitHub App manager for the app, and click Grant.
