@RequestMapping(value = "addFriend", method = RequestMethod.POST)
 @ResponseBody
 // TODO: change in android from Boolean to User, change argument to User
 public User createFriendshipRequest(@RequestBody User friend) throws DebtControlException {
   UserEntity user =
       userService.createAddingToFriendRequest(
           mapToEntity(friend), authenticationService.getAuthenticatedUser());
   return mapToDTO(user);
 }