main.py

import requests
import threading

def send_request(user_id, new_email):
    response = requests.post(f'http://127.0.0.1:5000/change_email/{user_id}', data={'email': new_email})
    print(response.text)

# Create threads to simulate concurrent requests
thread1 = threading.Thread(target=send_request, args=('1', 'newemail1@example.com'))
thread2 = threading.Thread(target=send_request, args=('2', 'newemail2@example.com'))

thread1.start()
thread2.start()

thread1.join()
thread2.join()