public async Task <LoginResult> LoginAsync(LoginModel loginModel)
{
var exists = authDataProvider.Users.FirstOrDefault(x => x.Email == loginModel.Login && x.PasswordHash == cryptService.CreateHash(loginModel.Password));
if (exists == null)
{
return(null);
}
var res = await GenerateTokenAndResult(exists);
await authDataProvider.SaveChangesAsync();
return(res);
}