#28 fix: add component imports in pages and isAuthenticated method

src/services/auth.js

@@ -61,6 +61,10 @@ class AuthService {
     return data.access;
   }
 
+  static isAuthenticated() {
+    return !!this.getAccessToken();
+  }
+
   static logout() {
     localStorage.removeItem(this.TOKEN_KEY);
     localStorage.removeItem(this.REFRESH_KEY);