private async Task <ClaimsIdentity> GetClaimsIdentityAsync(UserDto user)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
if (user.UserName == null)
{
throw new ArgumentNullException(nameof(user.UserName));
}
if (user.Password == null)
{
throw new ArgumentNullException(nameof(user.Password));
}
var userToVerify = await _manager.FindByNameAsync(user.UserName);
if (userToVerify == null)
{
throw new CredentialsException();
}
if (await _manager.CheckPasswordAsync(userToVerify, user.Password))
{
return(await _factory.GenerateClaimsIdentityAsync(userToVerify));
}
throw new CredentialsException();
}