Which ticket/Help Desk system should I choose?

Question

Helpdesk

It is necessary to organize a support system for the project.
Requirements:
1/ the possibility of general authorization on the resource and the support system (there must be an API).
2/ only one moderator will process messages)
3/ notifications to users about a new answer / notifications to a moderator about a new question.
4/ works in the cloud.
In general, this should be the most primitive support system.
Please advise something that performs these functions)

Answer 1

Good afternoon,
1. General authorization. from what? Radius, LDAP, OpenLDAP, and LocalBase or what?
2. Ok,
3. Well, of course, this is also available in the database. Email or SMS?
4. What does cloud mean? WiHost with Linux\Windows on board or Azure\Amazone - a rhetorical question!
From practice, the staff that does the support, he will take inventory after a while :)
so my suggestion is GLPI.

Answer 2

I recommend OTRS .