Send an email from the user (a gmail) to the receiver.

    Args:
        subject (str): Subject of the email.
        message (str): A message.
        filepaths (list(str)): Filepaths to files to be attached.
        config (defaultdict): A defaultdict.

async def send_with_attachments(subject, message, filepaths, config):
    """Send an email from the user (a gmail) to the receiver.

    Args:
        subject (str): Subject of the email.
        message (str): A message.
        filepaths (list(str)): Filepaths to files to be attached.
        config (defaultdict): A defaultdict.
    """
    email_ = MIMEMultipart()
    email_.attach(MIMEText(message))
    email_["Subject"] = subject
    email_["From"] = get_attribute_from_config(config, EMAIL_SECTION_KEY, USER_KEY)
    email_["To"] = get_attribute_from_config(config, EMAIL_SECTION_KEY, RECEIVER_KEY)
    _attach_files(filepaths, email_)
    await _send_email(email_, config)