Problems getting window size in Bevy 0.10

[ghost]

I was following the tutorial https://mbuffett.com/posts/bevy-snake-tutorial/ in bevy 0.10
I have translated everything so far but I am finding unable to find the new form of Res
I am getting the following error: 

  the trait `bevy::prelude::Resource` is not implemented for `bevy::prelude::Window`

[hymm]

Windows are entities now. You probably want something like Query<&Window, With<PrimaryWindow>>

[ghost]

Dankeschön