private object GetCheckUsernameResponseMessage(CheckUserNameStatus status)
        {
            switch (status)
            {
            case CheckUserNameStatus.AlreadyHasSameName:
                return("Korisnik već ima to korisničko ime.");

            case CheckUserNameStatus.Taken:
                return(new HttpResponseMessage {
                    StatusCode = HttpStatusCode.BadRequest, Content = new StringContent("Korisničko ime se već koristi.")
                });

            default:
                return("Korisničko ime je slobodno.");
            }
        }
        private HttpResponseMessage GetCheckEmailResponseMessage(CheckUserNameStatus status)
        {
            switch (status)
            {
            case CheckUserNameStatus.AlreadyHasSameName:
                return(new HttpResponseMessage {
                    StatusCode = HttpStatusCode.OK, Content = new StringContent("Korisnik već ima tu adresu.")
                });

            case CheckUserNameStatus.Taken:
                return(new HttpResponseMessage {
                    StatusCode = HttpStatusCode.BadRequest, Content = new StringContent("Email se već koristi.")
                });

            default:
                return(new HttpResponseMessage {
                    StatusCode = HttpStatusCode.OK, Content = new StringContent("Email je slobodan.")
                });
            }
        }