Error: Instance member 'res' can't be accessed using static access - flutter

Question

I am working on a searching for an element. I am using AutoComplete widget where users can type and based on matched results it will show suggestions. My data is coming from Post requests. Earlier there was a Get request and AutoComplete suggestion was working for me but now it has been changed to Post request.
Due to this now I am getting this error Instance member 'res' can't be accessed using static access
This is my search_model.dart
SearchSquad searchSquadFromJson(String str) =>
SearchSquad.fromJson(json.decode(str));
String searchSquadToJson(SearchSquad data) => json.encode(data.toJson());
class SearchSquad {
SearchSquad({
required this.count,
required this.res,
});
int count;
List<Re> res;
factory SearchSquad.fromJson(Map<String, dynamic> json) => SearchSquad(
count: json["count"],
res: List<Re>.from(json["res"].map((x) => Re.fromJson(x))),
);
Map<String, dynamic> toJson() => {
"count": count,
"res": List<dynamic>.from(res.map((x) => x.toJson())),
};
}
class Re {
Re({
required this.squadId,
required this.squadName,
required this.defaultProfileImageId,
required this.profimgid,
required this.profimgname,
required this.profimgurl,
required this.profimgrotation,
this.profimgposition1,
this.profimgposition2,
required this.profimgscale,
this.profimgrotationfocuspoint1,
this.profimgrotationfocuspoint2,
});
String squadId;
String squadName;
String defaultProfileImageId;
String profimgid;
String profimgname;
String profimgurl;
int profimgrotation;
dynamic profimgposition1;
dynamic profimgposition2;
double profimgscale;
dynamic profimgrotationfocuspoint1;
dynamic profimgrotationfocuspoint2;

Answer 1

change this
return SearchSquad.res
to
SearchSquad? searchSquad;//instance for the class
return searchSquad.res// change to this
I don't know where you called _getSearchSquad() function but you will get the point
SearchSquad? searchSquad; //instance for the class
void getSearch() async{
searchSquad = await _getSearchSquad(); //await it since its Future and put it in async function
}
return searchSquad.res// then use it in the return of AuthoComplete

Answer 2

Add a static key word before defining res static List<Re> res;