On root user run
Run the su postgres -c "/home/postgres/bin/psql -p 6000 -d omu -c \"update tbl_omu_user_info set passwd='f0923a2988ada0d95570a304ef15671ce8df23683c83e1c5c98db502fc9fccf3', salt='', first_flg=1 where user_name='Admin';\""
then log in using the default admin account