major revamp of http client functionalit

lib/utils/basic-auth.js

@@ -0,0 +1,10 @@
+const toBase64 = (str) => Buffer.from(str || '', 'utf8').toString('base64');
+
+module.exports = (auth) => {
+  if (!auth || !auth.username ||
+    typeof auth.username !== 'string' ||
+    (auth.password && typeof auth.password !== 'string')) return {};
+  const creds = `${auth.username}:${auth.password || ''}`;
+  const header = `Basic ${toBase64(creds)}`;
+  return {Authorization: header};
+};