diff --git a/lib/src/data/repository/repository_activity_impl.dart b/lib/src/data/repository/repository_activity_impl.dart
index cb51de2..9fcfe3f 100644
--- a/lib/src/data/repository/repository_activity_impl.dart
+++ b/lib/src/data/repository/repository_activity_impl.dart
@@ -59,8 +59,8 @@ class RepositoryActivityImpl extends RepositoryActivity {
   Future<List<SummaryActivity>> listLoggedInAthleteActivities(
       DateTime before, DateTime after, int page, int perPage) {
     var queryParams = {
-      "before": before.millisecondsSinceEpoch / 1000,
-      "after": after.millisecondsSinceEpoch / 1000,
+      "before": before.millisecondsSinceEpoch ~/ 1000,
+      "after": after.millisecondsSinceEpoch ~/ 1000,
       "page": page,
       "per_page": perPage
     };
diff --git a/lib/src/domain/model/model_authentication_response.dart b/lib/src/domain/model/model_authentication_response.dart
index c39a940..8ee1891 100644
--- a/lib/src/domain/model/model_authentication_response.dart
+++ b/lib/src/domain/model/model_authentication_response.dart
@@ -65,13 +65,14 @@ class TokenResponse {
 }
 
 class Athlete {
-  Athlete();
+  int id;
+  Athlete({required this.id});
 
   factory Athlete.fromRawJson(String str) => Athlete.fromJson(json.decode(str));
 
   String toRawJson() => json.encode(toJson());
 
-  factory Athlete.fromJson(Map<String, dynamic> json) => Athlete();
+  factory Athlete.fromJson(Map<String, dynamic> json) => Athlete(id:json["id"]);
 
-  Map<String, dynamic> toJson() => {};
+  Map<String, dynamic> toJson() => {"id":id};
 }