in buildSrc/src/main/groovy/HttpUtil.groovy [40:48]
static HttpRequest putRequest(url, String json, user, password) {
def body = HttpRequest.BodyPublishers.ofString(json)
HttpRequest.newBuilder()
.uri(new URI(url))
.header('Authorization', 'Basic ' + "$user:$password".getBytes('iso-8859-1').encodeBase64())
.header('Content-Type', 'application/json')
.PUT(body)
.build()
}