Give people read/write access to your personal repository by adding them as collaborators.
Tip: You can grant read/write access to collaborators on a personal repository. Repositories owned by an organization can grant more granular access. For more information, see "What are the different access permissions?"
- Ask for the username of the person you're adding as a collaborator.
 On GitHub Enterprise, navigate to the main page of the repository.
In the repository's right sidebar, click Settings.

Click the "Collaborators & teams" tab.

- Start typing the collaborator's username.
 - Select the user from the drop-down menu.
 - Click Add collaborator.