How to disable automatic creation of the camunda-platform realm in Camunda Identity and force usage of external realm qportal?

identity:
    container_name: identity
    image: camunda/identity:${CAMUNDA_IDENTITY_VERSION}
    ports:
      - "8084:8084"
    environment:
      - SERVER_PORT=8084
      - IDENTITY_URL=https://my-host/identity
      - IDENTITY_RETRY_DELAY_SECONDS=30
      - KEYCLOAK_URL=https://my-keycloak/keycloak      
      - IDENTITY_AUTH_PROVIDER_ISSUER_URL=https://my-keycloak/keycloak/realms/qportal
      - IDENTITY_AUTH_PROVIDER_BACKEND_URL=https://my-keycloak/keycloak/realms/qportal
      - IDENTITY_AUTH_PROVIDER_CLIENT_ID=camunda-identity
      - IDENTITY_AUTH_PROVIDER_CLIENT_SECRET=my-secret
      - IDENTITY_KEYCLOAK_REALM=qportal      
      - CAMUNDA_IDENTITY_TYPE=KEYCLOAK
      
      - LOGGING_LEVEL_ROOT=DEBUG
      - LOGGING_LEVEL_IO_CAMUNDA_IDENTITY=DEBUG
      - SPRING_LOGGING_LEVEL_ORG_APACHE_HTTP=TRACE
      - SPRING_LOGGING_LEVEL_ORG_SPRINGFRAMEWORK_WEB_CLIENT=TRACE
      - SPRING_LOGGING_LEVEL_ORG_SPRINGFRAMEWORK_WEB_CLIENT_REACTIVE=DEBUG
      - SPRING_LOGGING_LEVEL_ORG_SPRINGFRAMEWORK_SECURITY_OAUTH2=DEBUG
      - SERVER_LOGGING_LEVEL=TRACE
      - logging.level.org.springframework.web.client.RestTemplate=DEBUG
      - logging.level.org.apache.http=DEBUG
      
      - "JAVA_TOOL_OPTIONS=-Djavax.net.ssl.trustStore=/opt/truststore.jks -Djavax.net.ssl.trustStorePassword=changeit -Djavax.net.debug=ssl -Dlogging.level.io.camunda=DEBUG"
      - SPRING_WEB_FORWARD-HEADERS-STRATEGY=native
      
      - CAMUNDA_IDENTITY_SSO_SINGLE_SIGN_OUT_ENABLED="true"      
      - MULTITENANCY_ENABLED=${MULTI_TENANCY_ENABLED}
      - RESOURCE_PERMISSIONS_ENABLED=${RESOURCE_AUTHORIZATIONS_ENABLED}
    restart: on-failure
    volumes:
      - ./truststore.jks:/opt/truststore.jks
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.identity.tls=true"
      - "traefik.http.routers.identity.service=identity"
      - "traefik.http.services.identity.loadbalancer.server.port=8084"
      - "traefik.http.routers.identity.rule=PathPrefix(`/identity`)"
      - "traefik.http.middlewares.identity-midl.stripprefix.prefixes=/identity"
      - "traefik.http.middlewares.identity-midl.stripprefix.forceSlash=False"
      - "traefik.http.routers.identity.middlewares=identity-midl"
    networks:
      - peering-dev
      - camunda-platform