Xbox One Automatic Logon

At the top left of the screen, move to the Sign-in prompt and select it with the A button.

In the Who do you want to sign in as? screen (see screen shot below), and select the I wasn't recognized option.

Choose your account,then make sure in the Kinect view that it places the name next to your face.

Press the That's me option.

You will get a message that next time it will recognize you better next time.