How to get player.Character when holding a ProximityPrompt?

Hi!

I was wondering if you can use player.Character when holding a ProximityPrompt Or is there an other way to do this?

prompt.PromptButtonHoldBegan:Connect(function(promptObject, player)
    if player.Character:FindFirstChild("Key") then
        sound1:Play()
    else
        print("no key")
    end
 end)

The script will play a sound if you have the keys for the door you have to open. So I need to check if the player has them.