Trying to reset my skin

I have this code:

					local model = GetHashKey("u_m_y_rsranger_01")

					RequestModel(model)
					while not HasModelLoaded(model) do
						RequestModel(model)
						Citizen.Wait(0)
					end

					SetPlayerModel(PlayerId(), model)
					SetModelAsNoLongerNeeded(model)
			else
				-- THIS IS WHAT I AM TRYING TO FIGURE OUT --

Players have their own skin and clothes, and I have a menu where they can change their skin completely. I want to restore their original skin when they press the same button, but I cant figure this out.
How should I go with this?