Verifying your email address
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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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在边栏的“Access”部分中,单击 “Emails”****。 
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Under your email address, click Resend verification email.  
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GitHub will send you an email with a link in it. After you click that link, you'll be taken to your GitHub dashboard and see a confirmation banner. 
Next steps
For reference information, see 电子邮件地址参考.
If you are having trouble verifying your email address, see Troubleshooting email verification.