API to launch VM backup job

I am trying to launch VM backup via API but the api is not returning anything and there is no log in webserver.log.

url = "https://commandcenterhostname/commandcenter/api/v2/vsa/vm/{{GUID}}/backup?backupLevel=FULL"
 

import requests

url = "https://commandcenterhostname/commandcenter/api/v2/vsa/vm/503RF3C6-03BC-24M9-7MVV-3833433C96AB/backup?backupLevel=FULL"

payload={}
headers = {
  'Accept': 'application/json',
  'Authtoken': '**Token**'
}

response = requests.request("POST", url, headers=headers, data=payload,verify=False)

print(response.text)