async def converter_int(client, interaction_event, value):
    """
    Converter for ``ApplicationCommandInteractionOption`` value to `int`.
    
    This function is a coroutine.
    
    Parameters
    ----------
    client : ``Client``
        The client who received the respective ``InteractionEvent``.
    interaction_event : ``InteractionEvent``
        The received application command interaction.
    value : `str`
        ``ApplicationCommandInteractionOption.value``.
    
    Returns
    -------
    value : `None` or `int`
        If conversion fails, then returns `None`.
    """
    try:
        value = int(value)
    except ValueError:
        value = None
    
    return value