+* This example script  console script updates the request participants field on an issue.

+* "All right, title and interest in this code snippet shall remain the exclusive intellectual property of Adaptavist Group Ltd and its affiliates. Customers with a valid ScriptRunner

+* license shall be granted a  non-exclusive, non-transferable, freely revocable right to use this code snippet only within their own instance of Atlassian products. This licensing notice cannot be removed or

+* amended and must be included in any circumstances where the code snippet is shared by You or a third party." 

+*/

+

+// specify the issue key here for the issue to update

+def issueKey = ""

+

+// Specify the id for the Request Participants field here

+def requestParticipansField = ""

+

+// specify the account ID of the user to add as a request particaipant here

+def userAccountId = ""

+

+def result = put("/rest/api/2/issue/${issueKey}") 

+    .header('Content-Type', 'application/json') 

+    .body([

+fields:[

+(requestParticipansField): [

+    [id: userAccountId]

+    ]

+    ]

+])

+    .asString()

+

+