Help me for Saving TTT_Credits

[Gamestory]

is it right or how can make it?

function plymeta:SetDefaultCredits()
   if self:GetTraitor() then
      local c = GetConVarNumber("ttt_credits_starting")
   elseif self:GetDetective() then
      self:SetCredits(math.ceil(GetConVarNumber("ttt_det_credits_starting")))
   else
     self:SetCredits("TTT_Credits", self:GetCredits("TTT_Credits"))
   end
end