Use new CDS implementation in staging

ts/util/getBasicAuth.ts

@@ -0,0 +1,18 @@
+// Copyright 2020-2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { fromString, toBase64 } from '../Bytes';
+
+export type GetBasicAuthOptionsType = Readonly<{
+  username: string;
+  password: string;
+}>;
+
+export function getBasicAuth({
+  username,
+  password,
+}: GetBasicAuthOptionsType): string {
+  const auth = toBase64(fromString(`${username}:${password}`));
+
+  return `Basic ${auth}`;
+}