Add allow signup option to GitHub OAuth

History.md

@@ -8,6 +8,7 @@
 
 * `github-oauth@1.4.0`
   - More data will be retrieved and saved under `services.github` on the user account.
+  - Add option to disallow sign-up on GitHub using `allow_signup` [parameter](https://docs.github.com/en/developers/apps/building-oauth-apps/authorizing-oauth-apps#parameters), this will be activated based on your Accounts settings, specifically if the option `forbidClientAccountCreation` is set to `true`.
 
 #### Independent Releases
 

packages/github-oauth/github_client.js

@@ -25,12 +25,17 @@ Github.requestCredential = (options, credentialRequestCompleteCallback) => {
 
   const loginStyle = OAuth._loginStyle('github', config, options);
 
+  let allowSignup = '';
+  if (Accounts._options?.forbidClientAccountCreation)
+    allowSignup = '&allow_signup=false'; // https://docs.github.com/en/developers/apps/building-oauth-apps/authorizing-oauth-apps#parameters
+
   const loginUrl =
     'https://github.com/login/oauth/authorize' +
     `?client_id=${config.clientId}` +
     `&scope=${flatScope}` +
     `&redirect_uri=${OAuth._redirectUri('github', config)}` +
-    `&state=${OAuth._stateParam(loginStyle, credentialToken, options && options.redirectUrl)}`;
+    `&state=${OAuth._stateParam(loginStyle, credentialToken, options && options.redirectUrl)}` +
+    allowSignup;
 
   OAuth.launchLogin({
     loginService: "github",