public async Task Invoke(HttpContext context)
{
var handler = new ClaimsTransformationHandler(Options.Transformer);
handler.RegisterAuthenticationHandler(context.GetAuthentication());
try {
if (Options.Transformer != null)
{
context.User = await Options.Transformer.TransformAsync(context.User);
}
await _next(context);
}
finally
{
handler.UnregisterAuthenticationHandler(context.GetAuthentication());
}
}