adding express.Request back to interface

I tried to use the node-fetch request, however the express handlers
appear to be passing down express.Request so its seems to be the right
choice.

Signed-off-by: Brian Fletcher <brian@roadie.io>

plugins/auth-node/src/DefaultIdentityClient.ts

@@ -24,6 +24,7 @@ import {
   jwtVerify,
 } from 'jose';
 import { GetKeyFunction } from 'jose/dist/types/types';
+import { Request } from 'express';
 
 import { BackstageIdentityResponse } from './types';
 import { getBearerTokenFromAuthorizationHeader, IdentityApi } from '.';
@@ -77,7 +78,7 @@ export class DefaultIdentityClient implements IdentityApi {
   async getIdentity(req: Request) {
     try {
       return await this.authenticate(
-        getBearerTokenFromAuthorizationHeader(req.headers.get('authorization')),
+        getBearerTokenFromAuthorizationHeader(req.headers.authorization),
       );
     } catch (e) {
       return undefined;

plugins/auth-node/src/IdentityApi.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 import { BackstageIdentityResponse } from './types';
+import { Request } from 'express';
 
 /**
  * An identity client api to authenticate Backstage
@@ -28,5 +29,7 @@ export interface IdentityApi {
    * Returns a BackstageIdentity (user) matching the token.
    * The method throws an error if verification fails.
    */
-  getIdentity(req: Request): Promise<BackstageIdentityResponse | undefined>;
+  getIdentity(
+    req: Request<any>,
+  ): Promise<BackstageIdentityResponse | undefined>;
 }