I'm trying to get the npm package soap working.

This is the function I run:

  var soap = require('soap');
  var url = 'http://example.com/wsdl?wsdl';
  var args = {name: 'value'};
  soap.createClient(url, function(err, client) {
      client.MyFunction(args, function(err, result) {
          console.log(result);
      });
  });

It complains that MyFunction is not defined:

TypeError: Cannot read property 'MyFunction' of undefined

Do I have to define a function called MyFunction at the side? If so, what parameters should it take?