chore: add get access token example in angular demo

Author: tbozhikov

demo-angular/app/pages/home/home.component.html

@@ -9,5 +9,6 @@
     <StackLayout class="buttons">
         <FacebookLoginButton (logout)="onLogout($event)"></FacebookLoginButton>
         <Button text="Log out (custom)" (tap)="logout()"></Button>
+        <Button text="Get current access token" (tap)="getCurrentAccessToken()"></Button>
     </StackLayout>
 </StackLayout>

demo-angular/app/pages/home/home.component.ts

@@ -52,4 +52,10 @@ export class HomeComponent {
             this.navigationService.go(['login'], "slideRight");
         });
     }
+
+    public getCurrentAccessToken() {
+        let accessToken = Facebook.getCurrentAccessToken();
+
+        alert("Current access token: " + JSON.stringify(accessToken, null, '\t'));
+    }
 }

demo-angular/app/pages/login/login.component.html

@@ -1,4 +1,5 @@
 <StackLayout class="login-buttons">
     <FacebookLoginButton (login)="onLogin($event)"></FacebookLoginButton>
     <Button text="Continue with Facebook (custom)" (tap)="login()"></Button>
+    <Button text="Get current access token" (tap)="getCurrentAccessToken()"></Button>
 </StackLayout>

demo-angular/app/pages/login/login.component.ts

@@ -33,4 +33,10 @@ export class LoginComponent {
             }
         });
     }
+
+    public getCurrentAccessToken() {
+        let accessToken = Facebook.getCurrentAccessToken();
+
+        alert("Current access token: " + JSON.stringify(accessToken, null, '\t'));
+    }
 }

demo-angular/package.json

@@ -52,7 +52,8 @@
     "typescript": "~2.4.2",
     "webpack": "~3.8.1",
     "webpack-bundle-analyzer": "^2.8.2",
-    "webpack-sources": "~1.0.1"
+    "webpack-sources": "~1.0.1",
+    "uglifyjs-webpack-plugin": "~1.1.6"
   },
   "scripts": {
     "ns-bundle": "ns-bundle",