[Python] Why I am getting each time "Flood Wait Error"?

from telethon.sync import TelegramClient
import asyncio
import time


async def main_send(client):
time.sleep(1)
for url_h in ['@user1','@user2'.....,'@user50']:
bot_entity = await client.get_input_entity(peer=url_h)
await client.send_message(entity=bot_entity, message='message1')
time.sleep(10)
time.sleep(7)


async def main_get(client):
lst = []
for url_v in for url_h in ['@user1','@user2'.....,'@user50']:
bot_entity = await client.get_input_entity(url_v)
async for message in client.iter_messages(bot_entity, wait_time=10, limit=60):
lst.append(message)

api_id='...'
api_hash='...'
client = TelegramClient('for_otzv', api_id, api_hash)
with client:
client.loop.run_until_complete(main_send(client))
client.loop.run_until_complete(main_get(client))



I have a very simple application for sending bulk messages. The documentation says "telegram api has a limit of 20 request per minute". But i use sleep function, and it should be OK.

What can be wrong? I didnt terminate sessions. The errors:

telethon.errors.rpcerrorlist.SessionRevokedError: The authorization has been invalidated, because of the user terminating all sessions (caused by GetHistoryRequest)
​

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