public async Task SetRoleAsync(UserDto model)
{
var user = await _quizDbContext.Users.FindAsync(model.Id);
if (user != null)
{
await _validator.ValidateAsync(model);
_quizDbContext.Users.Update(model.AdaptToUser());
await _userManager.AddToRoleAsync(user, model.Role);
await _quizDbContext.SaveChangesAsync();
}
}