I want send message with telethon but i dont have phone number this . i have only @username Telegram. with this code i can send message for my contact phone :
result = client.invoke(ImportContactsRequest([contact], replace=True))
contacts = client.invoke(GetContactsRequest(""))
for u in result.users:
client.send_message(u, 'Hi')
But i want send message to @username Telegram