socket.on("register", function(data) {

        for (var key in users) {
            if (key.toLowerCase() == data.username.toLowerCase()) {
                socket.emit("register", { error: "userExists" });
                return;
            }
        }

    if (data.username.length >= 5) {
      if (data.password.length >= 6) {
        if (data.password == data.confirm) {
                    encryptedPassword = crypto.createHash('md5').update(data.password).digest('hex');
                    insert = { username: data.username, password: encryptedPassword };
                    con.query("INSERT INTO users SET ?", insert, function(err, res) {
                        if (err) throw err;
                        socket.emit("register", true);
                        console.log("INSERT success!");
                        console.log("Username: " + data.username);
                        console.log("Password: " + data.password);
                    });
                } else {
                    log("Password doesn't match.", "red");
                }
            } else {
                log("Password too short.", "red");
            }
        } else {
            log("Username too short.", "red");
        }
    });