Help with :GetPlayerFromCharacter ?

So I'm trying to build off the the BloxyColaScript in most food gear to add hunger/thirst quenching properties.

When I tried getting player from character (which I'm assuming is tool.parent) It comes with an error

21:33:33.799 - GetPlayerFromCharacter is not a valid member of Model

This is the script:

(The error comes from line 24)

local Tool = script.Parent;

enabled = true




function onActivated()
    if not enabled  then
        return
    end

    enabled = false
    Tool.GripForward = Vector3.new(0,-.759,-.651)
    Tool.GripPos = Vector3.new(1.5,-.5,.3)
    Tool.GripRight = Vector3.new(1,0,0)
    Tool.GripUp = Vector3.new(0,.651,-.759)


    Tool.Handle.DrinkSound:Play()

    wait(3)

    local player = Tool.Parent:GetPlayerFromCharacter(character)
    local thirst = player.PlayerGui.Thirst

    if (thirst ~= nil) then
                print("The player is here!")
    else  print ("Player not here :(")

        end
    end

    Tool.GripForward = Vector3.new(-.976,0,-0.217)
    Tool.GripPos = Vector3.new(0.03,0,0)
    Tool.GripRight = Vector3.new(.217,0,-.976)
    Tool.GripUp = Vector3.new(0,1,0)

    enabled = true



function onEquipped()
    Tool.Handle.OpenSound:play()
end

script.Parent.Activated:connect(onActivated)
script.Parent.Equipped:connect(onEquipped)

I'm testing it out by printing if player is there or not, but it doesn't print