Pass token between future classes in flutter - flutter

Question

I been reading multiple threads about passing data between futures, but for some reason I can get this to work.:(
I have two futures, where the first future is doing post request to retrieve a token
Future<AuthStart> fetchAuthStart() async {
final response = await http.post(
Uri.parse('http://ipsum.com/auth/start'),
body: jsonEncode(<String, String>{
'IdNumber': '198805172387',
}));
if (response.statusCode == 200) {
final responseJson = jsonDecode(response.body);
return AuthStart.fromJson(responseJson);
} else {
throw Exception("Failed");
}
}
this request will generate an GUID that I need in my next future
Future<AuthStatus> fetchAuthStatus(String token) async {
final response = await http.post(Uri.parse('http://ipsum/auth/status'),
body: jsonEncode(<String, String>{
'Token':token,
}),
);
if (response.statusCode == 200) {
return AuthStatus.fromJson(jsonDecode(response.body));
} else {
throw Exception("Failed");
}
}
I have tried multiple ways, one that worked was to pass the variable in my FutureBuilder like this
FutureBuilder(
future: futureAuthStart,
builder: (context, snapshot) {
if (snapshot.hasData) {
fetchAuthStatus(snapshot.data!.Token);
return Text(snapshot.data!.Token);
} else if (snapshot.hasError) {
return Text('${snapshot.error}');
}
return const CircularProgressIndicator();
},
),
But this does not make sense?
I would rather pass it in my InitState something like this.
void initState() {
super.initState();
futureAuthStart = fetchAuthStart();
futureAuthStatus = fetchAuthStatus(token);
}
Am I totally on the wrong path? Any tutorials out there that can give better info :)?
Thanks in advance.

Answer 1

Create a void function and pass it the functions and one at a time it will be executed with async/await. You should take a look at Asynchronous programming: futures, async, await.
void initState() {
super.initState();
_onInit();
}
void _onInit() async {
try {
var futureAuthStart = await fetchAuthStart();
var futureAuthStatus = await fetchAuthStatus(futureAuthStart.data.token);
}catch(e, stackTrace){
//handler error
print(e);
print(stackTrace);
}
}