How to kill the session in Oracle database of Amazon RDS service AWS

Identify the session with the following query:

SELECT SID, SERIAL#, STATUS FROM V$SESSION WHERE USERNAME = 'USERNAME';

Kill the session by using AWS rdsadmin package provided by AWS

BEGIN
    rdsadmin.rdsadmin_util.kill(
        sid    => sid, 
        serial => serial_number,
        method => 'IMMEDIATE');
END;
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