gistfile1.js

function GetAuth2Token(device) {
    return new Promise(function(resolve, reject) {
      QRC.setTargetIpAddress(device.ip, device.index);
      QRC.getToken(vm.current_password ||'12345678', device.index).then(sucFn);
        function sucFn(data) {
          QRC.setTargetAuthToken(data.data.access_token);
          resolve (data.data.access_token);
        }
      });
    }
var access_token;
GetAuth2Token(vm.scannedDevices[i]).then(function(data){
    access_token = data; 
    console.log(data);
});