Merge pull request #58 from line/feature/email-getter

Add an email getter for access token

Author: onevdog

example/lib/src/screen/home_page.dart

@@ -149,8 +149,7 @@ class _HomePageState extends State<HomePage>
           .login(scopes: _selectedScopes.toList(), option: loginOption);
       final accessToken = await LineSDK.instance.currentAccessToken;
 
-      final idToken = result.accessToken.idToken;
-      final userEmail = (idToken != null) ? idToken['email'] : null;
+      final userEmail = result.accessToken.email;
 
       setState(() {
         _userProfile = result.userProfile;
@@ -167,6 +166,7 @@ class _HomePageState extends State<HomePage>
       await LineSDK.instance.logout();
       setState(() {
         _userProfile = null;
+        _userEmail = null;
         _accessToken = null;
       });
     } on PlatformException catch (e) {

lib/src/model/access_token.dart

@@ -97,4 +97,13 @@ class AccessToken {
   /// The expected authorization type when this token is used in a request
   /// header. Fixed to `Bearer` for now.
   String get tokenType => _data['token_type'];
+
+  /// The email address set by the user. This value only exists when `idToken` is
+  /// valid and the user has set the email address in LINE and agreed to share it
+  /// with you. Both "openid" and "email" scopes are required to get the user email.
+  ///
+  /// If you are not applying an ID Token when login, or the user does not set
+  /// the email for the LINE account, or the user refuses to grant your access,
+  /// `null` is returned.
+  String? get email => idToken?['email'];
 }