I am really struggling with Meteor callbacks. I have a client side call to a server side method, but when the callback comes back from the server, I get an undefined result. As far as I can tell, this is because the server is not finished doing the POST but is already sending the callback. I am new to Meteor and this seems really difficult. What I have so far:

Client:

```
Meteor.call("createCustomer", city, fname, lname, email, function(error, result) {
  if (error) {
    console.log("error: " + error);
  } else {
    console.log("result: " + result)
  }
});

```

Server:

```
Meteor.methods({
  'createCustomer': function(city, fname, lname, email) {
    HTTP.call("POST", url+'/customer?api_key='+process.env.API_TOKEN ,{
      data: {
        city: city,
        first_name: fnam,
        last_name: lname,
        email: email
      }
    }, function (error, result) {
      if (error) {
        return 'error';
      } else {
        return'success';
      }
    });
  }
});

```

I might be doing something really stupid, or it might be more complex than I had anticipated, but any help would go a long way!