Computer Craft - ATM - OpenAccount

local startingMoney = 1000

shell.run("clear")
print("Please enter a username to continue:")
repeat
    term.write(">")
    wantedUsername = read()
    if(fs.exists(wantedUsername)) then
        print("That username is unavalible, please enter a valid one:")
        wantedUsername = nil
    end
until wantedUsername ~= nil
local userFile = fs.open(wantedUsername, "w")
print("Please enter a password:")
term.write(">")
local password = read("*")
userFile.writeLine(password .. " " .. startingMoney)
userFile.close()