/*
* 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()


return "User with the ${userAccountId} was set in the Request Participants field with the ID of ${requestParticipansField} on the ${issueKey} issue."