Completes the initialization of our application.
        Since `__init__` cannot be `async` we use this.

async def post_init(self):
        """
        Completes the initialization of our application.
        Since `__init__` cannot be `async` we use this.
        """
        if await self.cl.is_user_authorized():
            self.set_signed_in(await self.cl.get_me())
        else:
            # User is not logged in, configure the button to ask them to login
            self.sign_in_button.configure(text='Sign in')
            self.sign_in_label.configure(
                text='Sign in (phone/token):')