fixed registered_date and last_seen date issue, closes #58
fixed registered_date and last_seen date issue, closes #58

ben-jones/centinel-server,lianke123321/centinel-server,rpanah/centinel-server,lianke123321/centinel-server,lianke123321/centinel-server,iclab/centinel-server,iclab/centinel-server,ben-jones/centinel-server,iclab/centinel-server,rpanah/centinel-server,ben-jones/centinel-server,rpanah/centinel-server