--class
CLASS.Data = { }
function CLASS:SetData( pl, key, val )
    self.Data[ pl ] = self.Data[ pl ] or { }
    self.Data[ pl ][ key ] = val

    if CLIENT then
        RunConsoleCommand( "setdata", key, val )
    end
end

--somewhere serverside
local function SetData( pl, cmd, args )
    local key, val, class

    class = pl:GetPlayerClass( )

    if not class then
        return
    end

    class:SetData( key, val )
end

concommand.Add( "setdata", SetData )