title: Synchronicity with parse cloud code
body: <p>I am building an 'uber fox X' app, using parse server as a backend.</p>
  
  <p>My problem: when there is a pending request, many 'drivers' can offer to fullfill it. When a 'driver' chooses to to so, I need to ensure that the request has not been taken by another driver.</p>
  
  <p>I.e: I need the operation of assigning a request to a driver to be atomic, so that a second request always knows that a first has arrived</p>