Migrate to HttpClient in Account module.

src/accounts/accountBalances.service.ts

@@ -2,17 +2,17 @@
 import { Injectable } from '@angular/core';
 import { Observable } from 'rxjs/Rx';
 
-import { Restangular } from "ngx-restangular";
+import { HttpClient, HttpParams } from "@angular/common/http";
 
 import { AccountBalances } from './accountBalances';
 
 @Injectable()
 export class AccountBalancesService {
   constructor(
-    private restangular: Restangular
+    private http: HttpClient
   ) {}
 
   get(id: number): Observable<AccountBalances> {
-    return this.restangular.one('account', id).one('balances').get();
+    return this.http.get<AccountBalances>(`/api/account/${id}/balances`);
   }
 }