title: FeathersJS feathers-hooks-common add userId hook
body: <p>I'm using FeathersJS to build an app. I want to add userId in many services create requests, so that the already authenticated userId is added to the data created by the service. I know I can create a hook myself, but as I think this sounds as a common problem/requirement in many apps, I thought it should/could be done using someone of all the hooks available in feathers-hooks-common package.</p>
  
  <p>So my question is, how to use feathers-hooks-common to add the userId in the data provided with service create request?</p>
  
  <p>Thank you!</p>