Async or am I missing something?

Question

Python

There are 2 functions:

```
def get_sms():
  time.sleep(100)
  return token

def start(token=None):
  return result

start(*args ,token=get_sms())
```

The start function sends a message to the number and, after receiving the code, activates the user. (As I understand it, it only works with a coroutine that returns sms)
In the get_sms function, I wait for a message with a code and return it to start for full activation.
For some reason I can't do it synchronously as described above. As I understand it, until the start function is completely completed, SMS will not be sent to me.
How to do this through asyncio and is it necessary?
This is me using telethon if anything, there is such

# client.start(phone=phone, force_sms=True, code_callback=receive_sms, first_name='Вася', last_name='Пупкин')