Here's a reference link that will help you
Syntax is similar to the one which is used in cloud
First of all i said v2 not v3 . I use v2 and the question seems to talk about v3.
Secondly, of course i tried it . I even posted something quite similar in the question it doesnt work at all. I tried everything i saw on the internt .
Thirdly as mentioned in the question in our self hosted jira we dont have IDs for users.
When trying something like this as in the page you reffered me :
Hi, Jira users! Do you use Jira alongside Microsoft Teams? We want to hear how you’ve used the power of Jira Cloud and Microsoft Teams (via the Jira Cloud for Microsoft Teams app) to achieve a team...
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