Reviewing your authorized GitHub Apps
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In the upper-right corner of any page, click your profile photo, then click Settings.
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In the "Integrations" section of the sidebar, click Applications.
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Click the Authorized GitHub Apps tab.
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Review the GitHub Apps that have access to your account. For those that you don't recognize or that are out of date, click Revoke. To revoke all GitHub Apps, click Revoke all.