If you have a "server with open ports" running on a public IP address, your best bet is to set up a VPN from the LtAP mini to that server if you want to be able to manage the LtAP mini remotely. A permanently running VPN creates some LTE traffic which may be an issue for you, so if you do...
I am struggling to reset the User Manager web interface password using Router OS7.8, I have tried /tool user-manager and /user-manager but after that any combination of commands that I have found in the forums or YouTube fail to work... please help