feat(express): Export authenticateRequest

.changeset/gorgeous-teachers-scream.md

@@ -0,0 +1,11 @@
+---
+"@clerk/express": minor
+---
+
+Export [`authenticateRequest` method](https://clerk.com/docs/references/backend/authenticate-request) from `@clerk/express` (in case you want to go low-level and implement flows to your specific needs). You can use it like so:
+
+```ts
+import { authenticateRequest } from "@clerk/express"
+```
+
+This function is adapted to Express' Request wrapper and as such notably different to the exported function from `@clerk/backend`. If you need to use it, be sure to import from `@clerk/express`.

packages/express/src/__tests__/__snapshots__/exports.test.ts.snap

@@ -2,6 +2,7 @@
 
 exports[`module exports should not change unless explicitly set 1`] = `
 [
+  "authenticateRequest",
   "clerkClient",
   "clerkMiddleware",
   "createClerkClient",

packages/express/src/index.ts

@@ -6,3 +6,4 @@ export type { ExpressRequestWithAuth } from './types';
 export { clerkMiddleware } from './clerkMiddleware';
 export { getAuth } from './getAuth';
 export { requireAuth } from './requireAuth';
+export { authenticateRequest } from './authenticateRequest';