public void AddLike(AddLikeDto like)
{
var addLike = new Likes();
var existingLike = _likesRepository.GetFirstWhere(x => x.UserId == like.UserId && x.PostId == like.PostId);
if (existingLike != null)
{
throw new FlowException("Like already exists!");
}
addLike = DTOtoModel.AddLikeDTOtoLike(like, addLike);
_likesRepository.Add(addLike);
_likesRepository.SaveEntities();
}