The inverse of :func:`encrypt_email`.

    :param enc_email:
        The encrypted email address.

def decrypt_email(enc_email):
    """
    The inverse of :func:`encrypt_email`.

    :param enc_email:
        The encrypted email address.

    """
    aes = SimpleAES(flask.current_app.config["AES_KEY"])
    return aes.decrypt(enc_email)