Logstash Kafka SASL_PLAIN input plugin config

Hi,
I have been trying to connect logstash to my remote kafka instance, which has SASL_PLAIN authentication method, but still not able establish the connection and getting the following error :
org.apache.kafka.clients.NetworkClient][main] Bootstrap broker HOST:PORT (id: -1 rack: null) disconnected.
What is the right config of logstash input for connecting to remote kafka, which is of SASL_PLAIN authentication. I've gone through the documentation and didn't found any thing around this config.
I'm using logstash of version 7.17