this button only fires when i press r2 on cotrller | Roblox Studio Community | Page 1

bro
how do i make it fire when i hit A

local function OpenMenu()
    if CurrentTab == "Discovery" then
        CurrentTab = "Transistionion"
        warn("Going to creating league, from Discovery")
        local playerGui = player:WaitForChild("PlayerGui")
        local DSCT = playerGui:WaitForChild("ButtonHandler").League.DiscoveryFrame.ScrollingFrame

        fadeUI("DiscoveryFrame", false)
        BackBtn.TextButton.Interactable = false
        Makeleague.GroupCreateBack.TextButton.Selectable = false
        wait(.7)
        fadeUI("CreateLeague", true)
    elseif CurrentTab == "GroupInfo" then
        CurrentTab = "Transistionion"
        warn("Going to creating league, from Discovery")
        warn("Right Here")
        GroupInfoPage(false, CurrentGroup, true)
        BackButtonFade(false)
        BackBtn.TextButton.Interactable = false
        Makeleague.GroupCreateBack.TextButton.Selectable = false
        wait(.7)
        fadeUI("CreateLeague", true)
    else

    end
end

btn.MouseButton1Click:Connect(OpenMenu)
btn.Activated:Connect(OpenMenu)

#this button only fires when i press r2 on cotrller