How To implement appbar Search with provider api in flutter - flutter

Question

I'm getting all the users from API and showing it on a list view. what I need to do is when I search for a specific username, then it needs to show a list tile of users that match the same name .after that when I click that username in the search list view I need to show the user profile of that user which I need user-id
I already used showSearch(context: context, delegate: CustomSearchDelegate());
and I fail
this is my UserList Api Class
class GetSharedPatientList with ChangeNotifier {
Future<List<Content>> fetchPatientList(
BuildContext context,
) async {
final bool isConnected = await InternetConnectionChecker().hasConnection;
final prefs = await SharedPreferences.getInstance();
var uuid = prefs.getString("userId");
final bool session = await Session.sessionValid(context);
if (isConnected) {
if (session) {
try {
final response =
await http.get(Uri.parse('$baseUrl/profile_shares?uuid=$uuid'));
if (response.statusCode == 200) {
List jsonResponse = json.decode(response.body)['content'];
print(jsonResponse);
return jsonResponse.map((data) => Content.fromJson(data)).toList();
} else {
throw Exception('Unexpected error occured!');
}
} catch (e) {
Logger().e(e);
}
} else {}
} else {
Alert(
context: context,
type: AlertType.error,
title: "No Internet",
desc: "Please Check Your Internet Connection",
buttons: [
DialogButton(
onPressed: () => Navigator.pop(context),
color: green,
child: const Text(
"Ok",
style: TextStyle(color: Colors.white, fontSize: 20),
),
)
]).show();
}
throw Exception('Failed to load user');
}
}
CustomSearchDelegate Class
class CustomSearchDelegate extends SearchDelegate {
getList(BuildContext context) async {
List<Content> data = await Provider.of<GetSharedPatientList>(context)
.fetchPatientList(context);
return data;
}
// first overwrite to
// clear the search text
#override
List<Widget>? buildActions(BuildContext context) {
return [
IconButton(
onPressed: () {
query = '';
},
icon: const Icon(Icons.clear),
),
];
}
// second overwrite to pop out of search menu
#override
Widget? buildLeading(BuildContext context) {
return IconButton(
onPressed: () {
close(context, null);
},
icon: const Icon(Icons.arrow_back),
);
}
// third overwrite to show query result
#override
Widget buildResults(BuildContext context) {
List<Content> matchQuery = getList(context);
for (var pateint in matchQuery) {
if (pateint.recipientName!.contains(query.toLowerCase())) {
matchQuery.add(pateint);
}
}
return ListView.builder(
itemCount: matchQuery.length,
itemBuilder: (context, index) {
return ProfileList(
patientid: matchQuery[index].senderId.toString(),
username: matchQuery[index].senderName.toString(),
phn: matchQuery[index].phn.toString(),
sharedDate: matchQuery[index].sharedDate.toString(),
);
},
);
}
// last overwrite to show the
// querying process at the runtime
#override
Widget buildSuggestions(BuildContext context) {
List<Content> matchQuery = getList(context);
for (var pateint in matchQuery) {
if (pateint.recipientName!.toLowerCase().contains(query.toLowerCase())) {
matchQuery.add(pateint);
}
}
return ListView.builder(
itemCount: matchQuery.length,
itemBuilder: (context, index) {
return InkWell(
onTap: () {
UtilFunctions.navigateTo(context,
MainScreen(patientid: matchQuery[index].senderId.toString()));
},
child: ProfileList(
patientid: matchQuery[index].senderId.toString(),
username: matchQuery[index].senderName.toString(),
phn: matchQuery[index].phn.toString(),
sharedDate: matchQuery[index].sharedDate.toString(),
));
},
);
}
}
When I run this I'm getting _TypeError (type 'Future<dynamic>' is not a subtype of type 'List<Content>')
Any Help is much appreciated