~ $ accli -p $(pgrep organiser) -I | tee ~/MyDo
cs/Documents/debug2.txt
Credentials:
UID::user
GID::users
CAP::chown
CAP::fowner
GRP::users
GRP::metadata-users
GRP::calendar
SRC::com.nokia.maemo
TrackerReadAccess
TrackerWriteAccess
Location
FacebookSocial
~ $ ls -all /home/user/.calendar/db | tee ~/MyD
ocs/Documents/debug2.txt
ls: /home/user/.calendar/db: Permission denied

I also tried devel-su to access /home/user/.calendar/db got the same result Permission denied.