How to return value from SOAP function to meteor method?

I have a Meteor method inside that am calling the soap function.

Meteor is executing all the statement before its getting the response from soap client.

So i am getting a result as undefined.

I want to promise the soap execution before executing other statements in the method.

createSoapConnection(){
    var Soap = require('soap');
    var url = 'https://xxxxxx/index.php/api/v2_soap/?wsdl';
    var args = {username: 'xxxxxx', apiKey: 'xxxxxx'};
        let client = Soap.createClient(url, function(err, client){
        let result = client.login(args, function(err, result) {
        let sessionId = result.loginReturn.$value;
         console.log(sessionId);
            return {
                conn: client,
                sessionId: sessionId
                };
            });
        }); 
} 

I am calling this method by this meteor method.

addsoapmessage(){
        let a = Meteor.call("createSoapConnection");
        console.log(a);
}

In the console am getting undefined as a result. after that the session ID is getting printed. How do i solve this?

meteor add zardak:soap

Install this package in root of application folder. then try with those following codes.

var url = 'http://example.com/wsdl?wsdl';
var args = {name: 'value'};

try {
  var client = Soap.createClient(url);
  var result = client.MyFunction(args);

 return result; // or send this result to the function where ever you want.
}
catch (err) {
  if(err.error === 'soap-creation') {
    console.log('SOAP Client creation failed');
  }
  else if (err.error === 'soap-method') {
    console.log('SOAP Method call failed');
  }

}

You can do any soap api calls with these functions. for more details visit : https://atmospherejs.com/zardak/soap