How to fix errors on http put request on flutter - flutter

Question

I'm trying to authenticate using the below code and unable to succeed. It looks like the json structure is incorrect.
I've tried to check the same on native android using kotlin and it works correctly.
below are the logs
flutter: {data: {email: nelloresec#xxx.com, password: xxx}}
flutter: "{\"errors\":[]}"
flutter: http://xxx.xxx.xx
flutter: Instance of 'Response'
flutter: 400
flutter: {errors: []}

Answer 1

The default content-type for a body of types String, List<int> or Map<String, String> is 'text/plain' and I guess you want 'application/json'
In addition you can directly pass in the user object to the body paramater (as toJson will be invoked automatically by the json.encode()-function).
Lastly, you don't need to use both await and .then(...), await will suffice:
void userLogin(String url, User user) async {
http.Response response = await http.put(
'$url/api/login',
headers: {
HttpHeaders.contentTypeHeader: 'application/json',
},
body: json.encode(user),
);
if (response.statusCode == 200) {
print(url);
print(response.statusCode);
print(json.decode(response.body));
} else {
print(json.encode(response.body));
print(url);
print(response);
print(response.statusCode);
print(json.decode(response.body));
throw Exception("Error while fetching data");
}
}