About GitHub Advanced Security billing and licenses
If you want to use GitHub Advanced Security features on any repository apart from a public repository on GitHub, you will need a GitHub Advanced Security license, available with GitHub Enterprise Cloud or GitHub Enterprise Server. For information about how you can try GitHub Enterprise with GitHub Advanced Security for free, see "Setting up a trial of GitHub Enterprise Cloud" and "Setting up a trial of GitHub Advanced Security" in the GitHub Enterprise Cloud documentation.
For information on managing your GitHub Advanced Security license usage, see the GitHub Enterprise Cloud documentation.