Help on Integratign Aqara Gateway (Key)

i’m back asking your help for a topic that make me crazy.
I’m trying to integrate my Aqara Gateway with HA.

Following some tutorial i was able to find Token (32 char) but i’m not able to get the Key value, requested in configuration.yaml.

Is there a way for converting token to key ?
Or use directly the token ?

Thank you.