Update readmes, add preconfigured auth0 app

README.md

@@ -10,6 +10,9 @@ Note: This plugin is still under development, and some APIs might not be availab
     <img src="screenshots/flutter_03.png" alt="screen_02" height="300" />
 </div>
 
+## Example app in this project
+In the example/ folder, you will find a test application. See README.md there.
+
 ## Authentication API
 ### Usage
 To use this plugin, add `flutter_auth0` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).

example/README.md

@@ -1,8 +1,18 @@
-# flutter_auth0
+# flutter_auth0 Example
 
-A new Flutter project.
+A test app for flutter_auth0
 
-## Getting Started
+## Create a test app in auth0
 
-For help getting started with Flutter, view our online
-[documentation](https://flutter.io/).
+Create a new test app in auth0 dashboard. An Auth0 app allows different types of 
+authentication flows. To test the basic signup and signin using password, you have to
+choose app type Regular web application, choose None as Token Endpoint Authentication Method,
+ and under Advanced - Grant Types tick off Password as an allowed type.
+
+To test the web login, you also need to configure callback URLs as described in the main README.
+
+## Configure the example app
+
+In example/lib/main.dart, you need to update clientId and domain constants. The already configured id and 
+domain belongs to a test app (github.com/gregertw) that you may use (NOTE! You need to use a real email 
+address and the user will show up in the auth0 dashboard of this app).

example/lib/main.dart

@@ -3,8 +3,8 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_auth0/flutter_auth0.dart';
 
-final String clientId = 'your-client-id';
-final String domain = 'your-domain';
+final String clientId = 't_H_DVN6E3Mumz9-2U_AqkgDBpXkCea_';
+final String domain = 'actingweb.eu.auth0.com';
 
 final Auth0 auth = new Auth0(clientId: clientId, domain: domain);
 final WebAuth web = new WebAuth(clientId: clientId, domain: domain);
@@ -49,7 +49,11 @@ class _MyHomePageState extends State<MyHomePage> {
           waitResponse: true);
       return '''[Sign-Up Success] 
     User Id: ${user['_id']}''';
-    } catch (e) {
+    } 
+    on NullThrownError {
+      return 'Unknown error, user may already exist';
+    }
+    catch (e) {
       return e;
     }
   }