Realm does not exist

[CV008]

Good morning. Please can I use this bundle for a "bearer only client" in a rest api in symfony ? Or is it only for public client which have UI for redirection ?
I tried to omit the redirection parameters redirect_route and redirect_params: {} because this is not relevant for a bearer only client or rest microservice but it dosnt work.

when i test on postman i have this error message-> Realm does not exist

thx for your help in advance