refactor: standardize router naming and improve type annotations in examples

Author: arnabrahman

docs/features/event-handler/appsync-graphql.md

@@ -140,7 +140,7 @@ Let's assume you have `app.ts` as your Lambda function entrypoint and routes in
 
     We use `includeRouter` method and include all operations registered in the router instances.
 
-    ```typescript hl_lines="2-3 7"
+    ```typescript hl_lines="3-4 8"
     --8<-- "examples/snippets/event-handler/appsync-graphql/splitRouter.ts"
     ```
 
@@ -156,7 +156,7 @@ You can use `appendContext` when you want to share data between your App and Rou
 
 === "app.ts"
 
-    ```typescript hl_lines="9"
+    ```typescript hl_lines="10"
     --8<-- "examples/snippets/event-handler/appsync-graphql/appendContext.ts"
     ```
 

examples/snippets/event-handler/appsync-graphql/appendContext.ts

@@ -1,11 +1,13 @@
 import { AppSyncGraphQLResolver } from '@aws-lambda-powertools/event-handler/appsync-graphql';
+import type { Context } from 'aws-lambda/handler';
 import { postRouter } from './postRouter';
-import { usersRouter } from './userRouter';
+import { userRouter } from './userRouter';
 
 const app = new AppSyncGraphQLResolver();
 
-app.includeRouter([postRouter, usersRouter]);
+app.includeRouter([postRouter, userRouter]);
 
 app.appendContext({ requestId: crypto.randomUUID() });
 
-export const handler = async (event, context) => app.resolve(event, context);
+export const handler = async (event: unknown, context: Context) =>
+  app.resolve(event, context);

examples/snippets/event-handler/appsync-graphql/splitRouter.ts

@@ -1,9 +1,11 @@
 import { AppSyncGraphQLResolver } from '@aws-lambda-powertools/event-handler/appsync-graphql';
+import type { Context } from 'aws-lambda';
 import { postRouter } from './postRouter';
 import { userRouter } from './userRouter';
 
 const app = new AppSyncGraphQLResolver();
 
 app.includeRouter([postRouter, userRouter]);
 
-export const handler = async (event, context) => app.resolve(event, context);
+export const handler = async (event: unknown, context: Context) =>
+  app.resolve(event, context);

examples/snippets/event-handler/appsync-graphql/userRouterWithContext.ts

@@ -1,10 +1,10 @@
 import { Router } from '@aws-lambda-powertools/event-handler/appsync-graphql';
 
-const usersRouter = new Router();
+const userRouter = new Router();
 
-usersRouter.onQuery('getUsers', async (args, { sharedContext }) => {
+userRouter.onQuery('getUsers', async (args, { sharedContext }) => {
   const requestId = sharedContext?.get('requestId');
   return [{ id: 1, name: 'John Doe', email: '[email protected]', requestId }];
 });
 
-export { usersRouter };
+export { userRouter };