Chat realms Server

function readusertable()
userfile = fs.open("users", "r")
users = textutils.unserialize(userfile.readAll())
userfile.close()
end

function readpass()
passfile = fs.open("passwords", "r")
pass = textutils.unserialize(passfile.readAll())
passfile.close()
end

function readhats()
hatfile = fs.open("hats", "r")
hats = textutils.unserialize(phatfile.readAll())
hatfile.close()
end

version = "0.1 Alpha"
-- Alpha Is Company Employees only! --
idsconnected = {}
print("Chat Realms")
print(version)

readusertable()
readpass()

while true do
    id, msg = rednet.receive()
    if msg == "Logging in Chat realm" then
        validate = id
        id, msg = rednet.receive()
        if id == validate then
            username = msg
            if id == validate then
                validatepassword = msg
                if user[validate] == username then
                    if pass[validate] == validatepassword then
                        table.insert(idsconnected, id)

                        hat = hats[validate]

                        for i=1, #idsconnected do
                            rednet.send(idsconnected[1], "new user: ")
                        end
                        for i=1, #idsconnected do
                            rednet.send(idsconnected[1], user[validate])
                        end
                        for i=1, #idsconnected do
                            rednet.send(idsconnected[1], "hat:" )
                        end
                        for i=1, #idsconnected do
                            rednet.send(idsconnected[1], hat)
                        end
                    end
                end
            end
        elseif string:sub(1,7) == "chatrealm_message" then
            for i=1, #idsconnected do
                    rednet.send(idsconnected[i], msg)
                    end
        elseif table.contains(idsconnected, id) then
                for i=1, #idsconnected do
                    rednet.send(idsconnected[i], msg)
                end
            end
        end
end