Connect my Portenta H7 to AWS using the Portenta CAT M1 NB-IoT module with MQTT and AT commands

I need some help. I'm trying to connect my Portenta H7 to AWS using the Portenta CAT M1 NB-IoT module with MQTT and AT commands.

I found that the AT^SBNW command should work for this, but I haven't been able to find examples, so I'm unsure how the command works.

I believe the first step is:

AT^SBNW=is_cert,1

However, I'm not sure how to proceed with creating the secure command with certificates after that.

Can anyone provide guidance or examples?