anchor.diff:  Initializes authentication for the given user (all registered devices).
   
   ===== Server response
  -_AuthenticateRequestData_
  +`AuthenticateRequestData`
   
   ==== +HTTP POST+
   Completes the authentication, updating and returning properties for the device
  
positive.code:   When set, filter the properties returned by the names in the filter string.
  
  ===== Client Request
  _Dictionary_
  
  ===== Server Response
  DeviceDescriptor
  
  ==== +HTTP DELETE+
  Removes the device registration.
  
negative.code: Initializes registration for the given user (all registered devices).
  
  ===== Server response
  `RegisterRequestData`
    
  ==== +HTTP POST+
  
  