How to Add collaborators on GitHub Repository?

 Theory: Collaborators in GitHub are users who have been granted permission to contribute to a specific repository. Collaborators can make changes to the repository's code, create new branches, and submit pull requests. They can also create and manage issues and pull requests and can be assigned to issues and pull requests by the repository owner or other collaborators.

Procedure: To add collaborators to a GitHub repository, follow these steps:

1. Go to the repository page on GitHub and click on the "Settings” tab.

1.  Click on the "Manage access" button on the left-hand side of the page.
2. Click on the "Invite teams or people" button in the top right corner of the page.
3. Enter the GitHub username or email address of the person you want as a collaborator.  
4.  Click on the "Add" button to send the collaborator an invitation.
5.    The collaborator will receive an email notification with a link to accept the invitation. Once they accept the invitation, they will be added as a collaborator to the repository.
6. Also, keep in mind that adding collaborators gives them access to the repository, so make sure you trust the people you are adding as collaborators and only give them the level of access they need.