how do I sign up/in to another account in pyrogram - python-3.x

Question

I use Pyrogram — version 2.0 to create bot. I wanted to sing in/up to another number using the client I am connected to. That phone number may not have logged in to Telegram yet.
But when I use the "send_code" method, the session with which it used to connect gets terminated. I used API bot to get enough information (phone number, two-step verification, and code) and CLI bot to send code.
The code is like this:
import uvloop
from pyrogram import Client, filters
from pyrogram.types import Message
# Apply monkey patch listen
from pyromod import listen
uvloop.install()
api_bot = {
'name': 'my_bot',
'api_id': 5555555,
'api_hash': '932835f263b17eb623bd251d0',
'bot_token': '5225489486ZckBKhgGESKTHvZjQNuKXGtSHTpA'
}
proxy = {
"scheme": "socks5",
"hostname": "127.0.0.1",
"port": 9050,
}
client = Client(**api_bot, proxy=proxy)
async def login(name, phone_number, two_step_verification, chat_id) -> str or bool:
cli_bot = {
'name': '.....',
'api_id': 111111,
'api_hash': '...........',
'session_string': '...........................'
}
# In order to use the "send_code" method, we must connect to a client
async with Client(**cli_bot, proxy=proxy) as app:
await app.send_code(phone_number)
code = await app.ask(chat_id=chat_id,
text='send telegram code to me',
timeout=125)
# Connecting to the client whose number we received
async with Client(name, api_id, api_hash,
phone_number=phone_number,
phone_code=code,
in_memory=True,
password=two_step_verification,
proxy=proxy,
test_mode=True) as app:
session_string = await app.export_session_string()
if session_string:
with open(name + '.txt', 'w') as file:
string = (phone_number, two_step_verification, session_string, name)
file.write('\n'.join(string))
await client.send_message(chat_id, 'added successfully your phone number')
return True
#client.on_message(filters.private & (filters.contact | filters.text))
async def get_phone_number(app: Client, message: Message):
data = {'phone_number': '[phone]',
'name': 'jenny',
'two_step_verification': ''}
await(login(**data))
client.run()
and then get this error in line 34:
pyrogram.errors.exceptions.unauthorized_401.AuthKeyUnregistered: Telegram says: [401 AUTH_KEY_UNREGISTERED] - The key is not registered in the system. Delete your session file and login again (caused by "users.GetUsers")
Totally, I want to sign in/up to different accounts and extract their session-string. I don't know what is wrong with my code. Would you please guide me?