The code is now optional.

You can now add the integration without a required code for arming and disarming.

If you already have a code and you want to remove it, you can go to your .storage/core.config_entries with you HA stopped and remove your code from the section of the Securitas Integration. You need to do this with the HA stopped or the file will be override when HA shutsdowns. This is an advance topic, take care modifying this file.