public async Task <int> GetUserIdByUsername(string username)
        {
            String  userToken          = GetToken();
            UserDTO user               = new UserDTO();
            ApiResponse <UserDTO> data = await request.CallApiWithAuth <ApiResponse <UserDTO> >(ApiGetUserByUsername + username, userToken);

            user = data.Data;
            UserVMO userVMO = VMUserMapper.MapToModel(user);

            return(userVMO.Id);
        }
        public async Task <String> SignUp(UserVMO userVmo)
        {
            UserDTO userDto = VMUserMapper.MapToDTO(userVmo);
            ApiResponse <UserDTO> response = await request.AddUser <ApiResponse <UserDTO> >(userDto);

            String result = response.ErrorMessage;

            if (result != null)
            {
                return(result);
            }
            return("OK");
        }