Install mosquitto on the ASUS RT-AC66U B1 router

Good afternoon! I have an ASUS RT-AC66U B1 router with stock firmware. Installed lighttpd and mosquitto. Added mosquitto autorun script, but since the user is specified mosquito in the broker's config, the broker does not start. When manually adding a user through the adduser command and starting the broker. Everything works. But after rebooting the router, this user is deleted from the / opt / etc / passwd file and the broker does not start. At the same time, users
admin: x: 0: 0: admin: /...

Install mosquitto on the ASUS RT-AC66U B1 router