[Fix] Add Meta Headers to Auth Requests (#1154)

* fix(sdk-client-v3): add headers to auth requests

- add meta-headers to auth http requests

* chore(sdk-client-v3): feedback from pr

- remove leftover console.log statement

Author: ajimae

.changeset/loose-experts-stick.md

@@ -0,0 +1,5 @@
+---
+'@commercetools/ts-client': patch
+---
+
+Add meta-headers to auth http requests

packages/sdk-client-v3/src/middleware/auth-middleware/auth-request-executor.ts

@@ -19,6 +19,7 @@ export async function executeRequest(options: ExecuteRequestOptions) {
     userOption,
     tokenCacheObject,
     tokenCacheKey,
+    request,
   } = options
 
   let url = options.url
@@ -64,6 +65,7 @@ export async function executeRequest(options: ExecuteRequestOptions) {
       url,
       method: 'POST',
       headers: {
+        ...request.headers,
         Authorization: `Basic ${basicAuth}`,
         'Content-Type': 'application/x-www-form-urlencoded',
         'Content-Length': byteLength(body),