scaffolder-backend: remove auth-backend dependency

plugins/scaffolder-backend/package.json

@@ -34,7 +34,6 @@
     "@backstage/catalog-model": "^0.7.1",
     "@backstage/config": "^0.1.2",
     "@backstage/integration": "^0.3.2",
-    "@backstage/plugin-auth-backend": "^0.2.12",
     "@gitbeaker/core": "^28.0.2",
     "@gitbeaker/node": "^28.0.2",
     "@octokit/rest": "^18.0.12",

plugins/scaffolder-backend/src/service/router.ts

@@ -15,7 +15,6 @@
  */
 
 import { Config } from '@backstage/config';
-import { IdentityClient } from '@backstage/plugin-auth-backend';
 import Docker from 'dockerode';
 import express from 'express';
 import { resolve as resolvePath } from 'path';
@@ -136,7 +135,7 @@ export async function createRouter(
 
       // Forward authorization from client
       const template = await entityClient.findTemplate(templateName, {
-        token: IdentityClient.getBearerToken(req.headers.authorization),
+        token: getBearerToken(req.headers.authorization),
       });
 
       const validationResult: ValidatorResult = validate(
@@ -299,3 +298,7 @@ export async function createRouter(
 
   return app;
 }
+
+function getBearerToken(header?: string): string | undefined {
+  return header?.match(/Bearer\s+(\S+)/i)?.[1];
+}