trouble getting job id immediately after a save

I have a simple node.js server. It supports the ocassional HTTP request to
myserver/goDoSomethingThatTakesAWhile

I want to kue the job and pass back the job Id in the HTTP response and then let the client go wild checking for progress.

My problem is that the function that does the save and and wants to return the ID completes before the save completes and I do not get the job Id to send to the client.

```
let job = this.queue.create(name,dj)
.save(function (err) {
if (!err) {
console.log(job.id); // ==> works as expected but the function has already completed
} else {
//TODO
}
});
//console.log(job.id); ==> undefined at this point ergo the problem;
//would like to return job.id at this point, but it is not defined.
```
I suspect I am missing something terribly obvious here.

Start at the queue.create(name, dj).save callback shown in the issue and trace how the surrounding HTTP handler sends its response. Verify when the job ID becomes available relative to save completion, then confirm that the handler can return that ID after a successful save and handles the error path.

Written by the indexing model from the issue text.