How to get part from JSON using 'response.stream.bytesToString()' instead of "(response.body) ['data']" - flutter

Question

Edit 1:
I am new to Flutter, and coding altogether, so please answer in simple terms.
I can get a JSON string from this API: [https://reqres.in/api/users?page=1][1]. using jsonDecode(response.body)
And I can also get specific part within this JSON using
jsonDecode(response.body)['data'] // 'data' is a List[]
But Postman, generates this completely different code to get data from api.
Postman uses response.stream.bytesToString());
Now I want to keep using Postman's auto generated code, but tweek it such that I get only the List, 'data', from the API.
My full code is:
class ApiService {
Future<List<UserModel>> getData() async {
try{
Response response = await get( Uri.parse('https://reqres.in/api/users?page=2'));
List result = await jsonDecode(response.body)['data'];
if (response.statusCode == 200) {
print(response);
print('');
print(response.body);
print('');
print(result);
print('');
return result.map((e) => UserModel.fromJson(e)).toList();
}
else {
print(response.reasonPhrase);
throw Exception(response.reasonPhrase);
}
} catch(e){
print('Error AA gaya \n\n\n $e') ;
throw e;
}
}
}
------------
Postman generated code is:
==========================
var request = http.Request('GET', Uri.parse('https://reqres.in/api/users?page=2'));
a
http.StreamedResponse response = await request.send();
if (response.statusCode == 200) {
print(await response.stream.bytesToString());
}
else {
print(response.reasonPhrase);
}
[1]: https://reqres.in/api/users?page=1

Answer 1

your code is correct but the way you parse is wrong
Future<List<UserModel>> getData() async {
try{
Response response = await get( Uri.parse('https://reqres.in/api/users?page=2'));
if (response.statusCode == 200) {
var jdata = jsonDecode(response.body);
print(response);
print('');
print(response.body);
print('');
print(jdata);
print('');
return jdata['data'].map((e) => UserModel.fromJson(e)).toList();
}
else {
print(response.reasonPhrase);
throw Exception(response.reasonPhrase);
}
} catch(e){
print('Error AA gaya \n\n\n $e') ;
throw e;
}
}