add show total users in rocket chat server

src/app/services/chat.service.ts

@@ -0,0 +1,41 @@
+import { HttpHeaders } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { Observable } from "rxjs"
+import { AuthService } from './auth.service';
+import { HttpService } from './http.service';
+import { StorageService } from './storage.service';
+import { HttpClient, HttpHeaderResponse } from '@angular/common/http';
+import { environment } from 'src/environments/environment';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ChatService {
+  headers: HttpHeaders;
+  options:any;
+  
+
+  constructor(
+    private http:HttpClient,
+    private httpService: HttpService,
+    private authService: AuthService,
+    private storageService:StorageService,) {
+      this.headers = new HttpHeaders();
+      this.authService.userData$.subscribe((res:any)=>{
+        this.headers = this.headers.set('X-User-Id', res.userId);
+        this.headers = this.headers.set('X-Auth-Token', res.authToken);
+      });
+    }
+
+    getAllUsers(){
+      this.options = {
+        headers: this.headers,
+      };
+      console.log(this.headers);
+      
+      return this.http.get(environment.apiChatUrl+'users.list', this.options);
+    }
+    getPrivateGroups(){
+      this.http.get(environment.apiChatUrl+'groups.list', this.options);
+    }
+}