When using Github, an app integration can be used to efficiently onboard new teams to Codecov. The App Integration will allow teams to add Codecov directly to their repositories via the GitHub user interface.
This integration is meant to be a replacement for the Team Bot for GitHub. Using it will ensure that comments are posted to Pull Requests as Codecov, rather than a Team Bot user. One of these two is necessary for private repo access.
The best way to integrate with Codecov.io is to Install Codecov's GitHub App.
Once installed, you are done! You do not need to set a Team Bot because Codecov will use the integration to post statuses and comments.