How to add request participants in a comment using automation?

[Kim Edison Clemente]

I am creating an automation wherein I want to cancel a ticket and mention the request participants as a comment in the ticket. So far, I've accomplished the cancellation part while mentioning the request participants in the ticket was not achieved.

Here's my script:
Hi {{customfield_10020.value}} , this ticket will be cancelled for you are already informed.

The result was:
Hi  , this ticket will be cancelled for you are already informed.

Let me know if you have some inputs for my inquiry, I'm open for ideas.
Thank you and have a nice day Jira community.

[Gideon Nolte]

Hi Kim,

I recreated a rule like yours and got the commenting to work with:

{{issue.customfield_10020.displayName}}

Note: I assumed you use an user-picker type field. If not: Just remove '.displayName'

If you use a user-picker and want to spice up your comment a little by using an "@-Mention" that's possible with:

[~accountid:{{issue.customfield_10020}}] 

To find out more about how to use Smart Values I can recommend this reference, as well as this for user specific Smart Values.

Hope this helps.

Gideon