--- Alter balance ---
c ADD <user> <ammount> <reason>\n
s 200 Add OK\n or 402 No balance\n or 403 Not Coke\n or 404 Bad User\n
---- Set balance ---
-c SET <user> <ammount> <reason>\n
-s 200 Set OK\n or 403 Not Coke\n or 404 Bad User\n
--- Get Item list ---
c ENUM_ITEMS\n