Post request with body and headers in javascript

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Javascript

AngularJs

hi i have post request

function GetTokenfromGrap(resource, obj, failureCallback) {
            debugger;
            var deffered = $q.defer();
            resource = '/xxxxx.com/oauth2/token'
            var url = baseUrl + resource;
         
                var configurations = {
                    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
            }
            $http.post(url, obj, configurations).then(deffered.resolve).catch(function (data) {
                handleCatch(data);
                if (typeof failureCallback === 'function') failureCallback(data);
            });
            return deffered.promise;
        }

i want to add body to this request , how can i do this

What I have tried:

i googled it but i didn't get any solution