How to use X-CUBE-SAFEA1

Main board : nucleo-f446re

Extension board : x-nucleo-safea1b

Tool : cubeIDE

Library : Software package in cubeMX

Hello, This is Taron.

i connected uart(pc<-->main board) and i2c(main board <-->extension board) and tested X-CUBE-SAFEA1 Library.

But it's jsut logging this message.

How can i use the key and Signature?

Thanks