public void ManageRequisities(IUserRequisitiesDetail requisities)
        {
            UserRequisite userRequisities = new UserRequisite();
            userRequisities.UserId = periodicalContext.Users.Where(x => x.Nick == requisities.Nick).Select(x => x.UserId).FirstOrDefault();
            if (userRequisities.UserId != 0)
            {
                userRequisities.LastName = requisities.LastName;
                userRequisities.FirstName = requisities.FirstName;
                userRequisities.MiddleName = requisities.MiddleName;
                userRequisities.PostIndex = (int)requisities.PostIndex;
                userRequisities.Country = requisities.Country;
                userRequisities.City = requisities.City;
                userRequisities.District = requisities.District;
                userRequisities.Address = requisities.Street + " " + requisities.Building + " " + requisities.Room;
                userRequisities.Phone = requisities.Phone;
                userRequisities.Id = periodicalContext.UsersRequisites.Where(x => x.UserId == userRequisities.UserId).Select(x => x.Id).FirstOrDefault();
                if (userRequisities.Id == 0)
                {
                    periodicalContext.UsersRequisites.Add(userRequisities);
                }
                else
                {

                    periodicalContext.Entry(userRequisities).State = EntityState.Modified;
                }
                SaveChanges();
            }
        }
 public IUsersRequisite GetUserRequisites(string nick)
 {
     UserRequisite requisites = new UserRequisite();
     User user = periodicalContext.Users.Where(x => x.Nick == nick.ToLower()).Select(x => x).FirstOrDefault();
     if(user != null)
     {
         requisites = user.UserRequisite.FirstOrDefault();
     }
     return requisites;
 }