get current config in kafka

as suggested @LijuJohn i found the config in the server.log file. Thanks a lot!!

Here's full working command to list all configs for the broker with id=1:

./bin/kafka-configs.sh --bootstrap-server <broker-host>:9092 --entity-type 
brokers --entity-name 1 --all --describe

Since Kafka 2.5.0 (see issue here), you can now specify the --all flag to list all configs (not just the dynamic ones) when using ./kafka-configs.sh