How can I get a property from a user when I only have the users AccountID?

[stephen_clay]

I'm writing an automation rule that will send a slack message to each user mentioned on a comment. I can retrieve the account ID of each user and I have set a custom property of SlackID for each user. What I need is to retrieve the SlackID based on the AccountID.

E.g. {{AccountID.properties.SlackID}} or similar.

Is this possible?

[stephen_clay · Accepted solution]

Answering my own question.

Using the WebRequest action to call

https://wearejourney.atlassian.net/rest/api/3/user/properties/SlackID?accountId={{AccountID}}

gets me the property that I'm looking for.