Prepare the session after the connection has been established.

def session_preparation(self):
        """Prepare the session after the connection has been established."""
        self._test_channel_read()
        self.set_base_prompt()
        self.tmsh_mode()
        self.set_base_prompt()
        self.disable_paging(
            command="modify cli preference pager disabled display-threshold 0"
        )
        self.clear_buffer()
        cmd = 'run /util bash -c "stty cols 255"'
        self.set_terminal_width(command=cmd)