Problem with sword TakeDamage stacking during animation?

Can someone please help me figure out how to make this sword only do damage one time during the animation? The problem I'm having is "TakeDamage" is stacking the damage multiple times throughout the animation. I've tried adding in debounces. Perhaps all in the wrong places? Should I move the onTouch function inside the Attack function? Please help, I just want the weapon to animate and apply the damage once per swing. Thank you.

local sword = script.Parent 
local canAttack = true  
local canDamage = false


function onTouch(part)
    local character = part.Parent
    local player = game.Players:GetPlayerFromCharacter(character) 

    if player then
        if canDamage == true then
			character.Humanoid:TakeDamage(20)
        	
		end
    end
end
sword.Blade.Touched:Connect(onTouch) 

function Attack()

    local attack = sword.Parent.Humanoid:LoadAnimation(script.SwordSwing) 
    if canAttack == true then
        attack:Play()
    
        canAttack = false

        canDamage = true
        wait(0.25)
		canDamage = false
        wait(0.5)
        canAttack = true
		
	
end

end
sword.Activated:Connect(Attack)

The easy way to fix this problem is to add table inside .Touched event so that players will be 'cached' or 'stored' after damaged and you can check if the players were recently hit (damaged) or not. The table will also be reset for next use/click.

Code:

local sword = script.Parent 
local canAttack = true  
local canDamage = false


function onTouch(part)
    local character = part.Parent
    local player = game.Players:GetPlayerFromCharacter(character) 

    local recent_hits = {} -- Table to store recently damaged players
    if player then
        if canDamage == true and not recent_hits[player.Name] then -- if canDamage and player does not exists in recent_hits table
            character.Humanoid:TakeDamage(20)
            recent_hits[player.Name] = true -- Adding Player to recent_hits table
        end
    end
end
sword.Blade.Touched:Connect(onTouch) 

function Attack()

    local attack = sword.Parent.Humanoid:LoadAnimation(script.SwordSwing) 
    if canAttack == true then
        attack:Play()

        canAttack = false

        canDamage = true
        wait(0.25)
        canDamage = false
        wait(0.5)
        canAttack = true


end

end
sword.Activated:Connect(Attack)

You should also consider adding your .Touched event inside Attack() function after attack:Play() so that the players don't get hit when the player didn't click/activated the sword.