Add auth token to ApiService requests

- services/api.js was not sending Authorization header on any request
- Import getAccessToken and include it in all ApiService.request() calls

src/services/api.js

@@ -1,4 +1,6 @@
 // API Base Configuration
+import { getAccessToken } from "../tokenUtility";
+
 const API_BASE_URL = process.env.REACT_APP_API_URL || '';
 const API_PREFIX = '/api';
 
@@ -14,6 +16,7 @@ class ApiService {
     const config = {
       headers: {
         'Content-Type': 'application/json',
+        'Authorization': getAccessToken(),
         ...options.headers,
       },
       ...options,