Error codes
===========

Registration
------------
101 : can not save new user in database
102 : can not send confirmation email
103 : activation: username not found
104 : activation: wrong activation code

Teams
-----
424 : team not found
425 : can not access the team (not a member of this team)
426 : trying to edit team without admin or team leader privileges

Issues
------
404 : can not find / load issue
405 : no rights to access issue (user does not belong to corresponding team)

Issues discussion
-----------------
414 : can not delete comment (invalid primary key)
415 : do not have the right to delete comment

Resources
---------
454 : can not find / load resource
455 : trying to see details of a non published resource
456 : trying to edit resource without permission (not admin)