public async Task <IActionResult> UpdateUser([FromBody] User User)
        {
            ctx.Users.Update(User);
            await ctx.SaveChangesAsync();

            return(Ok());
        }
        public async Task <IActionResult> PostUser([FromBody] User User)
        {
            await appContext.Users.AddAsync(User);

            await appContext.SaveChangesAsync();

            return(Ok());
        }