How to I get my domain whitelisted to use twitter cards?

sagecycling · 2016-01-08T00:05:08.181Z

I get this when I plug in the url of my page.

sagecycling · 2016-01-08T00:07:10.133Z

I guess that image did not show up. I says not whitelisted even though I am not using a player card. How to I get whitelisted?

jublonet · 2016-01-08T07:58:30.573Z

Please post a link to your page, or copy-paste the relevant meta tags.