diff --git a/lib/addevent.dart b/lib/addevent.dart
index 72be5acb6708ea4dfb2fa3d13edaf697ea19bdf4..918c7d7f5bdd4aca3492dd4e30ff2445c0c40009 100644
--- a/lib/addevent.dart
+++ b/lib/addevent.dart
@@ -178,7 +178,6 @@ class _AddEventPageState extends State<AddEvent>  {
         ));
   }
 
-  //TODO: add field validators for freetext fields. Check allowed characters in sensor.awi.de
   @override
   Widget build(BuildContext context) {
     /* Get singletons to access relevant data here.*/
diff --git a/lib/configuration.dart b/lib/configuration.dart
index 56e37661de316e3189ddb9b38265feb2fb68a34f..245a4fbf378d61c5c3107c816f5c2ec231650209 100644
--- a/lib/configuration.dart
+++ b/lib/configuration.dart
@@ -27,19 +27,19 @@ Future<int> login() async {
 
   if (response.statusCode == 200) {
     debugPrint('Login success');
+    //TODO: display feedback to user that credentials are correct
 
     debugPrint(response.body.toString());
     debugPrint(response.headers.toString());
     debugPrint(response.headers['set-cookie']);
 
-
-    //TODO store token
-
   } else {
     debugPrint('Header: ' + response.headers.toString());
     debugPrint('Body: ' + response.body.toString());
     debugPrint('StatusCode: ' + response.statusCode.toString());
     throw Exception('Failed to login');
+
+    //TODO: display feedback to user. Only allow export in view events if user is valid.
   }
 
   return 0;
diff --git a/lib/datamodel.dart b/lib/datamodel.dart
index 3ad31f16aa1cdb14f80983e417371f96fe7607af..178ba4d5af497571dff1c2342c6e2845ca359e98 100644
--- a/lib/datamodel.dart
+++ b/lib/datamodel.dart
@@ -159,12 +159,10 @@ class EventType{
 class SensorLogin{
   String mail;
   String password;
-  String token;
 
   SensorLogin(
       this.mail,
       this.password,
-      this.token  //REST API access Token
       );
 
   String toJsonString() {
@@ -186,7 +184,7 @@ abstract class ConfigurationStoreBase {
   Collection currentCollection = Collection(id: -1, description: '', collectionName: '');
   List<Device> devices = [];
   List<EventType> eventTypes = [];
-  SensorLogin loginInformation = SensorLogin('', '', '');
+  SensorLogin loginInformation = SensorLogin('', '');
   bool initialized = false;
 
   Collection getCollectionFromName(String name) {
@@ -221,7 +219,7 @@ abstract class ConfigurationStoreBase {
     devices = [];
     eventTypes = [];
     currentCollection = Collection(id: -1, description: '', collectionName: '');
-    loginInformation = SensorLogin('admin', 'adminadmin', '');
+    loginInformation = SensorLogin('admin', 'adminadmin');
     initialized = false;
   }
 }
diff --git a/lib/login.dart b/lib/login.dart
index 16a3884b331a84ec4637eef2f959874f7df57158..0f52d951431493e6df35668de8928ce14fe61b67 100644
--- a/lib/login.dart
+++ b/lib/login.dart
@@ -31,9 +31,6 @@ Future<int> login() async {
     debugPrint(response.headers.toString());
     debugPrint(response.headers['set-cookie']);
 
-
-    //TODO store token
-
   } else {
     debugPrint('Header: ' + response.headers.toString());
     debugPrint('Body: ' + response.body.toString());
diff --git a/lib/main.dart b/lib/main.dart
index 9ba93c6a996efad7860101fd4b7b2625eb97505f..14701a675fef52c5d5758120a98140ac629139f9 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -18,79 +18,9 @@ void main() {
   configuration.reset();
 
   configuration.loginInformation.mail = 'admin';  // Sandbox.sensor.de  admin account
-  configuration.loginInformation.password ='adminadmin';
+  configuration.loginInformation.password ='adminadmin';  //TODO: replace for productive version.
 
-  // Add some dummy devices
-  // TODO: load from shared preferences.
-  // TODO: this shall be requested from sensor.awi.de after selecting a collection in configuration.
-  //configuration.devices.add(Device.fromJson({'id': 8311, 'urn':'station:neumayer_iii:awi_snow_sampler_1'}));
-  //configuration.devices.add(Device.fromJson({'id': 4086, 'urn':'acoustic_backscatter_sensor:test'}));
-  //configuration.devices.add(Device.fromJson({'id': 1393, 'urn':'vessel:polarstern:hydrosweep_ds3'}));
-
-  // Fill the textboxes in addevent with some usefull data.
-  // TODO: store this in shared preferences so that last entered data reappears when restarting the app.
-  //events.currentEvent.urn = 'vessel:polarstern:hydrosweep_ds3';
-  //events.currentEvent.id = -1;
-  //events.currentEvent.description = '';
-  //events.currentEvent.label = '';
-  //events.currentEvent.type = 'Configuration';
-  //events.currentEvent.startDate = '2022-03-09 15:06:00.000Z';
-  //events.currentEvent.endDate = '2022-03-09 15:08:00.000Z';
-
-  
-  //Add some dummy events to event store. Just development purpose. TODO: Remove after development.
-  /*
-  events.events.add(Event.fromJson({
-    'id': 8311,
-    'urn': 'station:neumayer_iii:awi_snow_sampler_1',
-    'label': 'SML_KO21_SC01',
-    'type': 'Deployment',
-    'description': 'Remi tool Tag1 1 Traverse',
-    'status': 'PENDING',
-    'startDate': '2022-03-08T05:29:26Z',
-    'endDate': '2022-03-08T06:29:26Z'
-  }));
-  events.events.add(Event.fromJson({
-    'id': 8311,
-    'urn': 'station:neumayer_iii:awi_snow_sampler_1',
-    'label': 'SML_KO21_SC01',
-    'type': 'Deployment',
-    'description': 'Remi tool Tag1 1 Traverse',
-    'status': 'PENDING',
-    'startDate': '2022-03-08T05:29:26Z',
-    'endDate': '2022-03-08T06:29:26Z'
-  }));
-  events.events.add(Event.fromJson({
-    'id': 8311,
-    'urn': 'station:neumayer_iii:awi_snow_sampler_1',
-    'label': 'SML_KO21_SC01',
-    'type': 'Deployment',
-    'description': 'Remi tool Tag1 1 Traverse',
-    'status': 'PENDING',
-    'startDate': '2022-03-08T05:29:26Z',
-    'endDate': '2022-03-08T06:29:26Z'
-  }));
-  events.events.add(Event.fromJson({
-    'id': 8311,
-    'urn': 'station:neumayer_iii:awi_snow_sampler_1',
-    'label': 'SML_KO21_SC01',
-    'type': 'Deployment',
-    'description': 'Remi tool Tag1 1 Traverse',
-    'status': 'PENDING',
-    'startDate': '2022-03-08T05:29:26Z',
-    'endDate': '2022-03-08T06:29:26Z'
-  }));
-  */
-
-  
-  //Add some dummy eventtypes.
-  // TODO: loard from shared preferences.
-  // TODO: request from https://sensor.awi.de/rest/sensors/events/getAllEventTypes in configuration widget.
-  //configuration.eventTypes.add(EventType.fromJson({'id': 317, 'generalName':'Configuration'}));
-  //configuration.eventTypes.add(EventType.fromJson({'id': 216, 'generalName':'Decommissioned'}));
-  //configuration.eventTypes.add(EventType.fromJson({'id': 187, 'generalName':'Deployment'}));
-  //configuration.eventTypes.add(EventType.fromJson({'id': 50, 'generalName':'Information'}));
-  //configuration.eventTypes.add(EventType.fromJson({'id': 16, 'generalName':'Maintenance'}));
+  // TODO: load configuration and events from shared preferences.
 
   runApp(MaterialApp(
     title: 'Mobile Event Log',
diff --git a/lib/viewevents.dart b/lib/viewevents.dart
index 5e25506431cfdefe1667de4d08fa0dda6b5233dc..a6d61044ea754a68a701887edd80d8e9d969a471 100644
--- a/lib/viewevents.dart
+++ b/lib/viewevents.dart
@@ -7,10 +7,13 @@ import 'package:http/http.dart' as http;
 
 Future<bool> syncEvents() async {
   final EventStoreInstance events = EventStoreInstance();
+  final ConfigurationStoreInstance configuration = ConfigurationStoreInstance();
 
-  String base_url = 'https://sandbox.sensor.awi.de/rest/sensors/events/putEvent/';
+  String baseUrl = 'https://sandbox.sensor.awi.de/rest/sensors/events/putEvent/';
   String url = '';
 
+
+
   debugPrint('Number of Events: ' + events.events.length.toString());
   debugPrint('Pending Events:');
   var index = 0;
@@ -19,11 +22,10 @@ Future<bool> syncEvents() async {
       debugPrint('Idx: ' + index.toString() + ' ' + event.toSensorJson().toString());
       index++;
 
-      url = base_url + event.id.toString() + '?createVersion=false';
+      url = baseUrl + event.id.toString() + '?createVersion=false';
       debugPrint('XXX ' + Uri.parse(url).toString());
       final response = await http.put(Uri.parse(url),
 
-
         headers: {
           "Content-Type": "application/json",
           "Cookie": "x-auth-token=72d9d4d20a33f87edca7e1ba01ce8db8"
@@ -32,14 +34,14 @@ Future<bool> syncEvents() async {
         encoding: Encoding.getByName("utf-8"),
       );
 
-      if (response.statusCode == 200) {
+      if (response.statusCode == 201) {
         debugPrint('put success');
+        event.status = 'EXPORTED';  //Update event status so that it is only exported once.
 
         debugPrint(response.body.toString());
         debugPrint(response.headers.toString());
         debugPrint(response.headers['set-cookie']);
 
-
       } else {
         debugPrint('Header: ' + response.headers.toString());
         debugPrint('Body: ' + response.body.toString());
@@ -54,17 +56,6 @@ Future<bool> syncEvents() async {
 
 
 
-
-
-
-
-
-
-
-
-
-
-
 class ViewEvents extends StatelessWidget {
   const ViewEvents({Key? key}) : super(key: key);