Trouble making simple increased JumpPower Script. Any Solutions?

Hello, script newbie here.

I am trying to tinker with the humanoid properties of the player, one of them being "JumpPower". I tried making a script that when the spacebar is pressed down, it increases the player's jump height by 30 studs. It did not execute the code at all when I pressed down the spacebar, I tried what I could to figure it out, then searched for solutions to this problem online to no avail.

Here is the code block:

UserInputService = game:GetService("UserInputService")
local humanjump = game.Workspace:FindFirstChild("Humanoid")

UserInputService.InputBegan:Connect(function(input,gameProcessedEvent)

    if input.KeyCode == Enum.KeyCode.Space and humanjump then
        input.humanjump.JumpPower = 30
    end
end)

What am I missing here? Do let me know.