Python API Add USer Error

Please Helkp me For This Code very Simple Add User

The pastebin URL is:{"response_status":{"status_code":4000,"messages":[{"status_code":4004,"type":"failed","message":"Internal Error"}],"status":"failed"}}

import requests
import urllib3
import  json

urllib3.disable_warnings()

API_ENDPOINT = 'https://192.20.10.30/api/v3/users'
  
data = {'user': {'first_name': 'Peter36526565','last_name': 'Atom','name': 'Peter Rabbit Atom','mobile': '02892902','login_name': 'qweqwe','password': 'peter'}}

data =str(data) 
args = {'TECHNICIAN_KEY':'805BF78A-A3A3-4EC5-BBE8-795024078F09','INPUT_DATA':data,'format':'json'}

r = requests.post(url = API_ENDPOINT,verify=False,params=args)
  
pastebin_url = r.text 
print('The pastebin URL is:%s'%pastebin_url)