Inviting a successor
The person you invite to be your successor must have a GitHub account.
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在 GitHub 任意页面的右上角,单击你的个人资料照片,然后单击“ Settings”****。 
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在左边栏中,单击 “Account”****。 
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Under "Successor settings", to invite a successor, begin typing a username, full name, or email address, then click their name when it appears.  
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Click Add successor. 
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如果出现提示,请确认你的帐户是否拥有 GitHub 访问权限。 有关详细信息,请参阅“Sudo 模式”。 
The user you've invited will be listed as "Pending" until they agree to become your successor.