Error when trying to get property from request type API

[Vanessa Conceição de Sousa]

I'm getting error 400 when trying to get property from request type.

Already tried to authenticate with an encodedBase64 user and password, but it didn't worked.

Code:

def username = "user"
def password = "token"
String credentials = username + ":" + password
def auth = "Basic " + credentials.bytes.encodeBase64().toString()

//String encoded = credentials.bytes.encodeBase64().toString()

def response = get("rest/servicedeskapi/servicedesk/99/requesttype/2141/property" + token_appender)
.header("cache-control", "no-cache")
.asObject(Map)
.body

//Import library clone attachments
import org.apache.http.entity.ContentType;

// Begin - Imports just to generate debud
import org.apache.log4j.Logger
import org.apache.log4j.Level
// End - Imports just to generate debud

// Only for test
def log = Logger.getLogger("com.acme.CreateSubtask")
log.setLevel(Level.DEBUG)
// Only for test

def issuekey = 'SDQ-1'

def result = get('/rest/api/2/issue/' + issuekey)
.header('Content-Type', 'application/json')
.asObject(Map)

def requestType = get ('/rest/servicedeskapi/request/'+ issuekey)
.header('Content-Type', 'application/json')
.asObject(Map)

def projectKey = result.body.fields.project.key

def requestTypeId = requestType.body.requestTypeId

def propertyKeyResult = get('rest/servicedeskapi/servicedesk/99/requesttype/2184/property')
.header('Content-Type', 'application/json')
.header('X-ExperimentalApi', 'opt-in')
.basicAuth('Authorization', auth )
.header("cache-control", "no-cache")
.asObject(Map)
.body

API documentation: https://developer.atlassian.com/cloud/jira/service-desk/rest/#api-rest-servicedeskapi-servicedesk-serviceDeskId-requesttype-requestTypeId-property-get

with Postman it works fine.