TypeError: semrush.backlinks_refdomains is not a function

[sanyog92]

Hello Urgent Help!!!

Guys when i was trying to get data from SEMRUSH API https://www.semrush.com/api-analytics/#domain_rank using backlinks_refdomains and backlinks_refips its showing me this error.

And when i called same function domain_rank it responded me in json format. can you help me out in this. Attached image is the result when is is give me domain_rank but not other factors like baclinks and etc. I am using this code.

`module.exports = {
index: function(req,res){

console.log("Hello welocme!");
var SEMRushAPI = require('sails-semrush');
var URL = "www.flipkart.com";
var database = {database:'us'};
var semrush = new SEMRushAPI('XXXXXXXXXXXXXXX');

semrush.backlinks(URL, database, function(err, response){
if (err){

    console.log("There is some error to fetching web traffic on API !");
    console.log("err: ",err);
    console.log("There is some error to fetching web traffic on API !");
    }else{
             console.log("backlinks");
        console.log(" Response: ",response);
        console.log("**************** Get the web traffic successfully ***************");
        console.log("******zone, country, ip*******");
    } 

semrush.backlinks_refdomains(URL, database, function(err, response){
if (err){

    console.log("There is some error to fetching web traffic on API !");
    console.log("err: ",err);
    console.log("There is some error to fetching web traffic on API !");
    }else{

console.log("domain_score_asc, domain_score_desc, backlinks_asc, backlinks_desc, last_seen_asc, last_seen_desc, first_seen_asc, first_seen_desc");
console.log(" Response: ",response);
console.log("**************** Get the web traffic successfully **************");
console.log("zone, country, ip");
}
});`