plugin-kafka/src/test/resources/kafka_plain.jaas

KafkaServer {
            org.apache.kafka.common.security.plain.PlainLoginModule required
            username="admin"
            password="password"
            user_admin="password"
            user_alice="security";
};

KafkaClient {
            org.apache.kafka.common.security.plain.PlainLoginModule required
            username="alice"
            password="security";
};