attachment = open("/tmp/some.pdf", "rb")

mailgun_data = {
    "from": "test@test.com",
    "to": "sebastiaan@sevaho.io",
    "subject": "testje",
    "html": "testje",
}

async def main():
    auth = aiohttp.BasicAuth(login="api", password=API_MAILGUN)
    try:
        async with aiohttp.ClientSession(auth=auth) as session:
            with aiohttp.MultipartWriter("mixed") as mpwriter:

                mpwriter.append(attachment, {"Content-Type": "multipart/form-data"})
                mpwriter.append_json(mailgun_data)

                async with session.post(
                    f"https://api.mailgun.net/v3/{ API_MAILGUN_DOMAIN }/messages",
                    data=mpwriter,
                ) as resp:
                    response = await resp.text()
                    print(response)

    except Exception as e:
        print(e)
        raise Exception("something went wrong while sending email")


asyncio.run(main())