$http({
            method: 'POST',
            url: appConstant.webApiUrl + '/Token',
            data: userData,
            headers: { 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8' },
            transformRequest: function (obj) {
                var str = [];
                for (var p in obj)
                    str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
                return str.join("&");
            }
        }).success(function (data, status, headers, cfg) {

var obj = {
        method: 'POST',
        headers: {
          'Accept': 'application/json',
          'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
          //'Origin': '',
          //'Host': 'api.producthunt.com'
        },
        body: JSON.stringify({
          'userName': 'test@gmail.com',
          'password': 'Password!',
          'grant_type': 'password'
        })
      }
      fetch('http://identity.azurewebsites.net' + '/token', obj)
        .then(function(res) {
          console.log(res)
          return res.json();
       })
        .then(function(resJson) {
          console.log(resJson)
          return resJson;
        })
      }
    },

var str = [];
    var test = function(value){
      for (var p in value)
        str.push(encodeURIComponent(p) + "=" + encodeURIComponent(value[p]));
         return str.join("&");
     }
    test(value);
    var obj = {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    },
    body:{data:str}
   }
 fetch('http://identity.azurewebsites.net' + '/token', obj)
 .then(function(res) {
   console.log(res)
   return res.json();
})
 .then(function(resJson) {
   console.log(resJson)
   return resJson;
 })

var params = {
    userName: 'test@gmail.com',
    password: 'Password!',
    grant_type: 'password'
};

var formData = new FormData();

for (var k in params) {
    formData.append(k, params[k]);
}

var request = {
    method: 'POST',
    headers: headers,
    body: formData
};

fetch(url, request);

var details = {
    'userName': 'test@gmail.com',
    'password': 'Password!',
    'grant_type': 'password'
};

var formBody = [];
for (var property in details) {
  var encodedKey = encodeURIComponent(property);
  var encodedValue = encodeURIComponent(details[property]);
  formBody.push(encodedKey + "=" + encodedValue);
}
formBody = formBody.join("&");

fetch('http://identity.azurewebsites.net' + '/token', {
  method: 'POST',
  headers: {
    'Accept': 'application/json',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: formBody
})

var data = new URLSearchParams();
data.append('userName', 'test@gmail.com');
data.append('password', 'Password');
data.append('grant_type', 'password');