Create ticket API integration error

Create ticket API integration error

I am not able to find the url destination for creating a new ticket with python through xml data. 
The error in python says check the parameters used.  
import urllib.request

authtoken = '#######'
OAuth="Desk.tickets.CREATE"
params = {'authtoken': authtoken,'scope':'supportapi', 'xmlData':'<ticket><row no="3"><FL val="CONTACT NAME">JOHN</FL> <FL val="EMAIL">JOHN@JJ.COM</FL> <FL val="PHONE"> 555-555-5555 </FL> <FL val="SUBJECT"> NOT ABLE TO FIND CS </FL> <FL val="DESCRIPTION"> INFO NOT GIVEN ANYWHERE </FL> <FL val="STATUS"> OPEN </FL></row></ticket>'}



final_URL = "https://crm.zoho.com/crm/private/xml/"
data = urllib.parse.urlencode(params).encode("utf-8")

#print (data)

request = urllib.request.Request(final_URL,data)

response = urllib.request.urlopen(request)

xml_response = response.read()

print (xml_response)