[keycloak-user] Pre-requistes for Non-interactive Realm, Application, User setup in Keycloak

Hello,   I am quite aware that REST API is the only way for non-interactive integration to setup Realm, Application, and Users in Keycloak. Having said that even before invoking desired api,  we need Client ID (Account), Client Secret, Username and password (after resetting) to obtain the access token. 1. what is the best way to obtain these values for subsequent API invocations? 2. I observed there is a mechanism to upload a JSON file with Realm configuration but how can I export it at the first place. Please share your thoughts. Best Kamal