Creating multiple tokens for OAuth Apps
You can create multiple tokens for a user/application/scope combination to create tokens for specific use cases.
This is useful if your OAuth App supports one workflow that uses GitHub for sign in and only requires basic user information. Another workflow may require access to a user's private repositories. Using multiple tokens, your OAuth App can perform the web flow for each use case, requesting only the scopes needed. If a user only uses your application to sign in, they are never required to grant your OAuth App access to their private repositories. There is a limit to the number of tokens that are issued per user/application/scope combination. If your application requests enough tokens to go over one of the limits, older tokens will stop working.
Warning: Revoking all of a user's access to an application deletes any SSH keys the application generated on behalf of the user, including deploy keys.