Mishka CMS Auth GitHub

Sign in with GitHub for Mishka CMS. Each site switches it on and sets its own keys; no other setup is needed.

Install

# mix.exs
{:mishka_cms_auth_github, "~> 0.0.1"}

Run mix deps.get and restart. The package registers itself with Mishka CMS through mishka_installer; there is no config to add and no migration.

Set up

1. Make the app at GitHub → Settings → Developer settings → OAuth Apps → New OAuth App.
2. Authorization callback URL: https://<your-site>/api/auth/user/provider/callback
3. In Mishka CMS: Settings → Security → Sign-in methods → switch GitHub on. Paste the Client ID and Client secret into the fields that open under it, then Save.

The GitHub button now shows on the sign-in and registration pages.

What it does

• The account's primary email is used, and only when GitHub says it is verified. An OAuth app takes one callback URL, so make one app per address.
• Links to an existing confirmed account with the same email, and claims one nobody confirmed.
• Makes a new account only while the site allows it, and never makes a master.
• Asks for the authenticator code when the account has two-step sign-in.
• Uses PKCE (S256) on top of the state check.
• Keeps none of GitHub's tokens.

License

Apache-2.0