Repositories owned by an organization can grant more granular access. For more information, see "Access permissions on GitHub."
Os convites pendentes expirarão após 7 dias, restaurando quaisquer licenças não reclamadas.
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Ask for the username of the person you're inviting as a collaborator. 
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On your GitHub Enterprise Server instance, navigate to the main page of the repository. 
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Abaixo do nome do repositório, clique em Configurações.  
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In the left sidebar, click Collaborators.  
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Under "Collaborators", start typing the collaborator's username. 
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Select the collaborator's username from the drop-down menu.  
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Click Add collaborator. 