Connecting external API into Thingworx

Hello,
I am trying to connect external API into Thingworx.  But i am unable to receive responses.  I attached my code here.  and i upload my result also.  Please help me to do that.
Code:

var params = {
proxyScheme: undefined /* STRING */,
headers: { 'grant_type':'*****','client_id':'******','client_secret':'******','resource':'*******'},
ignoreSSLErrors: true,
useNTLM: undefined /* BOOLEAN */,
workstation: undefined /* STRING */,
useProxy: undefined /* BOOLEAN */,
withCookies: undefined /* BOOLEAN */,
proxyHost: undefined /* STRING */,
url: "https://******", /* STRING */
timeout: 6000,
proxyPort: undefined /* INTEGER */,
password: undefined /* STRING */,
domain: undefined /* STRING */,
username: undefined /* STRING */
};

// result: JSON
var result = Resources["ContentLoaderFunctions"].GetJSON(params);