pass additional headers directly

Author: DaniilShmelev

tool.ts

@@ -199,7 +199,12 @@ export function findLocalToolVersions(toolName: string, arch?: string) {
  * @param handlers  optional handlers array.  Auth handlers to pass to the HttpClient for the tool download.
  * @param auth      optional custom auth header value.  This is passed as a HTTP header to the download client.
  */
-export async function downloadTool(url: string, fileName?: string, handlers?: ifm.IRequestHandler[], auth?: string): Promise<string> {
+export async function downloadTool(
+    url: string,
+    fileName?: string,
+    handlers?: ifm.IRequestHandler[],
+    additionalHeaders?: ifm.IHeaders
+): Promise<string> {
     return new Promise<string>(async (resolve, reject) => {
         try {
             handlers = handlers || null;
@@ -228,12 +233,6 @@ export async function downloadTool(url: string, fileName?: string, handlers?: if
                 throw new Error("Destination file path already exists");
             }
 
-            const additionalHeaders: ifm.IHeaders = {};
-            if (auth) {
-                tl.debug('adding authorization header');
-                additionalHeaders['Authorization'] = auth;
-            }
-
             tl.debug('downloading');
             let response: httpm.HttpClientResponse = await http.get(url, additionalHeaders);