You will need to create a personal access token if you don't have one already in GitHub. Notice in the following screenshot that there is a link called Create an access key here:
Once you click the Create an access key here link, you will be redirected to the following GitHub page:
You can just keep the default options checked and then click the green button titled Generate token. Make sure to keep this personal access token in a safe place as it will only be shown once; copy it as we will need it. ...