Gmod Money system and buy system help

[MasterKenneth]

How do i get this down

i already have some code but theres errors with them dont know the problem

sh_player.lua
include( 'sh_player.lua' )
AddCSLuaFile( "sh_player.lua" )

local meta = FindMetaTable("Player") --Get the meta table of player
 
function meta:AddMoney(amount)
	local current_cash = self:GetMoney()
	self:SetMoney( current_cash + amount )
end
 
function meta:SetMoney(amount)
	self:SetNetworkedInt( "Money", amount )
	self:SaveMoney()
end
 
function meta:SaveMoney()
	local cash = self:GetMoney()
	self:SetPData("money", cash)
end
 
function meta:SaveMoneyTXT()
	file.Write(gmod.GetGamemode().Name .."/Money/".. string.gsub(self:SteamID(), ":", "_") ..".txt", self:GetMoneyString())
end
 
function meta:TakeMoney(amount)
   --Add money function here
   self:AddMoney(-amount)
end
 
function meta:GetMoney()
	return self:GetNetworkedInt( "Money" )
end

it crashes my game

function GM:PlayerShouldTakeDamage( victim, pl )
if pl:IsPlayer() then -- check the attacker is player 	
if( pl:Team() == victim:Team() and GetConVarNumber( "mp_friendlyfire" ) == 0 ) then -- check the teams are equal and that friendly fire is off.
		return false -- do not damage the player
	end
end
 
	return true -- damage the player
end

MONEY_STARTAMOUNT = 1000 --Can be changed to your starting amount
 
function FirstSpawn( ply )
	local cash = ply:GetPData("money") --Get the saved money amount
 
	if cash == nil then --If it doesn't exist supply the player with the starting money amount
		ply:SetPData("money", MONEY_STARTAMOUNT) --Save it
		ply:SetMoney( MONEY_STARTAMOUNT ) --Set it to the networked ints that can be called from the client too
	else
	ply:SetMoney( cash ) --If not, set the networked ints to what we last saved
	end
 
end
hook.Add( "PlayerInitialSpawn", "playerInitialSpawn", FirstSpawn )
 
 function PrintCash( ply )
	ply:ChatPrint("Your cash is: " .. ply:GetMoney())
end
 
function fPlayerDisconnect( ply )
	print("Player Disconnect: Money saved to SQLLite and TXT")
	ply:SaveMoney()
	ply:SaveMoneyTXT()
end
 
concommand.Add("cash_get",PrintCash)

[c👌de_g🎷]

What are the errors?

[MasterKenneth]

I cant load the game with this code

[editline]25th July 2014[/editline]

I Fixed the crashing i get this error
[ERROR] gamemodes/spsnowballfight/gamemode/init.lua:223: attempt to call method 'GetMoney' (a nil value)
1. unknown - gamemodes/spsnowballfight/gamemode/init.lua:223
2. unknown - lua/includes/modules/concommand.lua:69

[Tomvdr]

How many more threads are you going to create? We're not here to spoonfeed you. Learn Lua if you want to code. Don't expect us to help with every error and stick to one thread.