Flutter Return API Value to FutureBuilder Null - api

Question

I want to get data from API and convert it List to show it to Mobile, but FutureBuilder always said my data is null. I already print my data it has the data. But when I return it to FutureBuilder it just null.
API Example
{
"success": true,
"data": {
"current_page": 1,
"data": [
{
"absence_date": "2021-02-09",
"time_in": "07:51:34",
"time_out": "17:14:28"
},
{
"absence_date": "2021-02-08",
"time_in": "07:53:56",
"time_out": "17:09:15"
},
{
"absence_date": "2021-02-05",
"time_in": "07:53:32",
"time_out": "17:17:31"
}
],
"last_page": 4
}
}
Attendance.dart -> Model
#JsonSerializable()
class Attendance {
#JsonKey()
List<dynamic> data;
#JsonKey()
int last_page;
Attendance();
factory Attendance.fromJson(Map<String, dynamic> json) => _$AttendanceFromJson(json);
Map<String, dynamic> toJson() => _$AttendanceToJson(this);
}
ListView.dart -> _fecthJobs
Widget build(BuildContext context) {
return FutureBuilder<List<Job>>(
future: _fetchJobs(),
builder: (context, snapshot) {
print(snapshot.data);
if (snapshot.hasData) {
List<Job> data = snapshot.data;
return _jobsListView(data);
} else if (snapshot.hasError) {
return Text("${snapshot.error}");
}
return CircularProgressIndicator();
},
);
}
Future<List<Job>> _fetchJobs() async {
SharedPreferences prefs = await SharedPreferences.getInstance();
var email = prefs.getString('email');
await api.attendances(email).then((items) async {
if (items.success == true) {
Attendance att = Attendance.fromJson(items.data);
print(att.data);
return att.data.map((job) => new Job.fromJson(job)).toList();
}
}).catchError((e) {
print('Exception $e');
});
}
I print att.data, it has the data API, but when it in snapshot.data it say it's null