import groovyx.net.http.HTTPBuilder
import static groovyx.net.http.Method.GET
import static groovyx.net.http.ContentType.JSON

def http = new HTTPBuilder("https://kfsssiteapi.sands.local/")
  http.auth.basic 'JIRA_WORKER', 'g%Hax7t8cz)QH[3))'
def data = http.get(
    path: 'v2.1/lk/api/findClient?phone=9106463635',
    contentType : JSON
                 )