Gears of War 4 beta

I have just got xbox one, and my question is hiw to get the open beta? Today, April 25th, it should be out. I don't see it anywhere. Can somebody help?

Try this, they said it on the GOW twitter account:

The #Gears4Beta is now open to all Xbox Live Gold Members! Search for 'Gears of War 4 Beta' on the Xbox Dashboard