backend-next: use stringifyEntityRef in github provider module

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/backend-next/package.json

@@ -28,6 +28,7 @@
     "@backstage/backend-defaults": "workspace:^",
     "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/backend-tasks": "workspace:^",
+    "@backstage/catalog-model": "workspace:^",
     "@backstage/plugin-adr-backend": "workspace:^",
     "@backstage/plugin-app-backend": "workspace:^",
     "@backstage/plugin-auth-backend": "workspace:^",

packages/backend-next/src/authModuleGithubProvider.ts

@@ -15,6 +15,10 @@
  */
 
 import { createBackendModule } from '@backstage/backend-plugin-api';
+import {
+  DEFAULT_NAMESPACE,
+  stringifyEntityRef,
+} from '@backstage/catalog-model';
 import { githubAuthenticator } from '@backstage/plugin-auth-backend-module-github-provider';
 import {
   authProvidersExtensionPoint,
@@ -40,7 +44,11 @@ export default createBackendModule({
                 );
               }
 
-              const userEntityRef = `user:default/${userId}`;
+              const userEntityRef = stringifyEntityRef({
+                kind: 'User',
+                name: userId,
+                namespace: DEFAULT_NAMESPACE,
+              });
 
               return ctx.issueToken({
                 claims: {

yarn.lock

@@ -27355,6 +27355,7 @@ __metadata:
     "@backstage/backend-defaults": "workspace:^"
     "@backstage/backend-plugin-api": "workspace:^"
     "@backstage/backend-tasks": "workspace:^"
+    "@backstage/catalog-model": "workspace:^"
     "@backstage/cli": "workspace:^"
     "@backstage/plugin-adr-backend": "workspace:^"
     "@backstage/plugin-app-backend": "workspace:^"