Sign on with QSECOFR or a user same similar to QSECOFR and have access to reset DST password.
Type this command on the cmd line CHGDSTPWD PASSWORD(*DEFAULT). The QSECOFR DST password will be reset to the default value — QSECOFR. If the QSECOFR DST profile has been renamed, the profile name will also be reset back to QSECOFR.
When signing on to DST, the passwords are case-sensitive; so it must be entered as all upper-case until the default is changed.