How to send a request with a token to a secure keycloak service?

Question

JSON Web Token

I found examples in which microservices are protected using keycloak and to access them they send a request to postman where in the authentication column via openId 2.0 they get an access token and use it for the request
I tried to find examples where this logic is placed in the controller, but did not succeed
Maybe Can anyone please tell me how, when contacting the controller, to make it receive this token itself (so that I, for example, can log it for demonstration), say, using keycloak user credentials and then modify the request to the secure controller using this token?