message: Correct the parameter to accept array of type string
diff: @@ -94,7 +94,7 @@ export class GraphRequest {
  }
  - private urlJoin(urlSegments:[string]):String {
  + private urlJoin(urlSegments:string[]):String {
  const tr = (s) => s.replace(/\/+$/, '');
  const tl = (s) => s.replace(/^\/+/, '');
  const joiner = (pre, cur) => [tr(pre), tl(cur)].join('/');
  