How to change the app_eui

hi,

I use the app_eui give in this doc :
[https://www.loraserver.io/lora-app-server/use/devices/]

but i can’t find this key anywhere, i just use it with rak811 nod on ota mode ??

? have you any idea where is store it ?

You don’t really need one or set it anywhere, link