from telethon.sync import TelegramClient
from telethon import functions, types
with TelegramClient(name, api_id, api_hash) as client:
result = client(functions.channels.EditCreatorRequest(
channel='username',
user_id='username',
password=types.InputCheckPasswordSRP(
srp_id=-12398745604826,
A=b'arbitrary\x7f data \xfa here',
M1=b'arbitrary\x7f data \xfa here'
)
))
print(result.stringify())