code: func (api UsersAPI) DeleteAuthorization(w http.ResponseWriter, r *http.Request) {
  	username := mux.Vars(r)["username"]
  	grantedTo := mux.Vars(r)["grantedTo"]
  
  	userMgr := user.NewManager(r)
  
  	err := userMgr.DeleteAuthorization(username, grantedTo)
  	if handleServerError(w, "Delete authorization", err) {
  		return
  	}
  	w.WriteHeader(http.StatusNoContent)
  }
docs: // DeleteAuthorization is the handler for DELETE /users/{username}/authorizations/{grantedTo}
  // Remove the authorization for an organization, the granted organization will no longer
  // have access the user's information.