Pass validation when configurating users and groups

The github app auth provider was preventing admins from configuring users and groups because validation will fail without a client secret. Other auth providers, like `shell/edit/auth/oidc.vue`, get around this by short-circuiting to true when not editing the config.

Signed-off-by: Phillip Rak <rak.phillip@gmail.com>

shell/edit/auth/github.vue

@@ -97,6 +97,11 @@ export default {
     },
 
     validationPassed() {
+      // Allows for configuring authorized users and groups
+      if ( this.model.enabled && !this.editConfig ) {
+        return true;
+      }
+
       if (!this.model.clientId || !this.model.clientSecret) {
         return false;
       }