Getting HMD resolution

Does anyone know if there is a way to get a users HMD resolution in UE4.21? im trying to make a spectator camera by using the SceneCaptureComponent2D, but if the Texture Target’s resolution doesn’t match the HMD’s resolution (both eyes combined) then the fps gets absolutely crippled.

Right, after fiddling with it for a while it seems that the “get spectator display resolution” returns the resolution of a HMD’s singe eye resolution, while i can use this to get the devices resolution, it doesnt really help with the rifts. The rift S for example has a native resolution of 2560 x 1440, but it gets rendered at 3296x1776 or 3008x1616 depending on whether you are using the quality or performance graphic preferences, meaning i also need to know what setting the user has set their rift on.