title: Secret API key for accessing Django REST framework
body: <p>My aim is to restrict access to API for client applications by specifying API Key. Various services allow you to access their API by means of secret Key, which you have to get in order to perfom requests. </p>
  
  <p>Note: this is not related to user auth. </p>
  
  <p>Is there any straightforward solution to do this in django rest framework? Or just to pass the key in request header and then manually handle it?</p>
  
  <p>Regards</p>