Telethon doesn't read my phone number (Telegram)

Question

So I'm trying to create a script to read messages from telegram. Basically I found this script online but it isn't working correctly

This is the code

import configparser
import json
import asyncio
from datetime import date, datetime

from telethon import TelegramClient
from telethon.errors import SessionPasswordNeededError
from telethon.tl.functions.messages import (GetHistoryRequest)
from telethon.tl.types import (
    PeerChannel
)


# some functions to parse json date
class DateTimeEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, datetime):
            return o.isoformat()

        if isinstance(o, bytes):
            return list(o)

        return json.JSONEncoder.default(self, o)


# Reading Configs
config = configparser.ConfigParser()
config.read("config.ini")

# Setting configuration values
api_id = config['Telegram']['api_id']
api_hash = config['Telegram']['api_hash']

api_hash = str(api_hash)

phone = config['Telegram']['phone']
username = config['Telegram']['username']

# Create the client and connect
client = TelegramClient(username, api_id, api_hash)

async def main(phone):
    await client.start()
    print("Client Created")
    # Ensure you're authorized
    if await client.is_user_authorized() == False:
        await client.send_code_request(phone)
        try:
            await client.sign_in(phone, input('Enter the code: '))
        except SessionPasswordNeededError:
            await client.sign_in(password=input('Password: '))

    me = await client.get_me()

    user_input_channel = input('enter entity(telegram URL or entity id):')

    if user_input_channel.isdigit():
        entity = PeerChannel(int(user_input_channel))
    else:
        entity = user_input_channel

    my_channel = await client.get_entity(entity)

    offset_id = 0
    limit = 100
    all_messages = []
    total_messages = 0
    total_count_limit = 0

    while True:
        print("Current Offset ID is:", offset_id, "; Total Messages:", total_messages)
        history = await client(GetHistoryRequest(
            peer=my_channel,
            offset_id=offset_id,
            offset_date=None,
            add_offset=0,
            limit=limit,
            max_id=0,
            min_id=0,
            hash=0
        ))
        if not history.messages:
            break
        messages = history.messages
        for message in messages:
            all_messages.append(message.to_dict())
        offset_id = messages[len(messages) - 1].id
        total_messages = len(all_messages)
        if total_count_limit != 0 and total_messages >= total_count_limit:
            break

    with open('channel_messages.json', 'w') as outfile:
        json.dump(all_messages, outfile, cls=DateTimeEncoder)

with client:
    client.loop.run_until_complete(main(phone))

So basically when I run this, I get this

Please enter your phone (or bot token):

And when I type my phone number (+3xxxxxxxx) in correct international format, and press enter, nothing happens. So the program is stuck there. Any help?