docs: miscellaneous permission tutorial step 2 fixes

Signed-off-by: MT Lewis <mtlewis@users.noreply.github.com>

docs/permissions/plugin-authors/02-adding-a-basic-permission-check.md

@@ -146,7 +146,7 @@ In order to test the logic above, the integrators of your backstage instance nee
 -   async handle(): Promise<PolicyDecision> {
 +   async handle(
 +     request: PolicyQuery,
-+     user?: BackstageIdentityResponse,
++     _user?: BackstageIdentityResponse,
 +   ): Promise<PolicyDecision> {
 +     if (isPermission(request.permission, todoListCreatePermission)) {
 +       return {
@@ -204,7 +204,7 @@ First we'll clean up the `plugins/todo-list-backend/src/service/router.test.ts`:
       const router = await createRouter({
         logger: getVoidLogger(),
         identity: {} as DefaultIdentityClient,
-+       permissions: toPermissionEvaluator,
++       permissions: permissionEvaluator,
       });
       app = express().use(router);
     });
@@ -235,7 +235,7 @@ Then we want to update the `plugins/todo-list-backend/src/service/standaloneServ
 +   ServerTokenManager,
   } from '@backstage/backend-common';
   import { DefaultIdentityClient } from '@backstage/plugin-auth-node';
-  import { ServerPermissionClient } from '@backstage/plugin-permission-node';
++ import { ServerPermissionClient } from '@backstage/plugin-permission-node';
   import { Server } from 'http';
   import { Logger } from 'winston';
   import { createRouter } from './router';
@@ -285,4 +285,44 @@ Then we want to update the `plugins/todo-list-backend/src/service/standaloneServ
   module.hot?.accept();
 ```
 
+Finally, we need to update `plugins/todo-list-backend/src/plugin.ts`:
+
+```diff
+  import { loggerToWinstonLogger } from '@backstage/backend-common';
+  import {
+    coreServices,
+    createBackendPlugin,
+  } from '@backstage/backend-plugin-api';
+  import { createRouter } from './service/router';
+
+  /**
+  * The example TODO list backend plugin.
+  *
+  * @alpha
+  */
+  export const exampleTodoListPlugin = createBackendPlugin({
+    id: 'exampleTodoList',
+    register(env) {
+      env.registerInit({
+        deps: {
+          identity: coreServices.identity,
+          logger: coreServices.logger,
+          httpRouter: coreServices.httpRouter,
++         permissions: coreServices.permissions,
+        },
+-       async init({ identity, logger, httpRouter }) {
++       async init({ identity, logger, httpRouter, permissions }) {
+          httpRouter.use(
+            await createRouter({
+              identity,
+              logger: loggerToWinstonLogger(logger),
+              permissions,
+            }),
+          );
+        },
+      });
+    },
+  });
+```
+
 Now when you run `yarn tsc` you should have no more errors.