LUA HELP

Hello all i am needing help enabling my mouse pointer for my gamemode when you hit TAB

so people can click my panel on the screen this is my panel code:

local P = vgui.Create( "DPanel", DermaPanel )
P:SetPos( 25, 50 )
P:SetSize( 250, 250 )
P.Paint = function() 
    surface.SetDrawColor( 50, 50, 50, 255 )
    surface.DrawRect( 0, 0, P:GetWide(), P:GetTall() )
end
 
local DermaButton = vgui.Create( "DButton", P )
DermaButton:SetText( "Pick Team!" )
DermaButton:SetPos( 20, 10 )
DermaButton:SetSize( 200, 100 )
DermaButton.DoClick = function ()
    RunConsoleCommand( "BRP_START" )
end

(User was banned for this post ("UNDESCRIPTIVE THREAD TITLE (also, don't write all-caps thread titles)" - Gran PC))

gui.EnableScreenClicker(true) and then set it to false on OnClick

ok so i how would i make that work for tab and what do i put it in cl_init or init