public void DeleteFriendship(DeleteFriendshipInput input)
{
long memberId1 = _memberRepository.GetAll().First(x => x.UserName == input.UserName1).Id;
long memberId2 = _memberRepository.GetAll().First(x => x.UserName == input.UserName2).Id;
_memberRepository.DeleteFriend(memberId1, memberId2);
_memberRepository.DeleteFriend(memberId2, memberId1);
}