returning null value when flutter http get request(Instances of _<Future> dynamic)

Question

i am trying to get a data from a flask rest api but it keeps returning null value when it converted toString() it displays "Instances of _ dynamic"

getPass() async {
var response = await http.get(Uri.http("127.0.0.1:5000","generate"));
var jsonData = jsonDecode(response.body);
var pass = jsonData['Password'];
return pass;

}

onPressed: () {
     getPassword = getPass().toString();
     setState(() {
     finalPassword = "hi $getPassword";
                    });
                  },

.....

Center(child: Text(
          finalPassword,
          //textAlign: TextAlign.center,
          style: const TextStyle(
            fontFamily: 'OpenSansCondensedBold',
            fontSize: 23,
            color: Colors.red,
          ),
        )),

api code

@app.route('/generate', methods=['GET', 'POST'])

def getPassword(): # put application's code here global response d={}

if request.method == "POST":

    input1 = request.form['Input1']
    input2 = request.form['Input2']
    input3 = request.form['Input3']
    response = Generation.GeneratePassword(input1, input2, input3)

    return " "
else:
    d['Password'] = response
    return jsonify(d)

displays out put when calling in browser but not in the app

Answer 1

you should await your call to getPass as it returns a future:

onPressed: () async {
     getPassword = await getPass();
     getPasswordString = getPassword.toString();
     setState(() {
     finalPassword = "hi $getPasswordString";
              });
          },