/*
* This example script console script updates an issue and sets user fields.
* "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." 
*/

def issueKey = '<Issue Key Here>'
def newSummary = 'Issue Updated by a script'

def result = put('/rest/api/2/issue/' + issueKey)
        .header('Content-Type', 'application/json')
        .body([
        fields:[
                summary: newSummary,
                // Update the assignnee field using the syntax below.
                assignee:[name:"<UsernameHere>"],
                // Update the reporter field using the syntax below.
                reporter:[name:"<UsernameHere>"],
                // Update a custom user picker field by specifying the ID of the custom field below.
                customfield_10069: [name:"<UsernameHere>"]
        ]
])
        .asString()
if (result.status == 204) {
    return 'Success'
} else {
    return "${result.status}: ${result.body}"
}