Write token file and upload it to correct S3 bucket

upload_auth.py

def upload_auth():
    ''' Write token file and upload it to correct S3 bucket and folder
        S3 Bucket name and cert domain must be the same!
    '''
    f = open("/tmp/verification.txt", "w")
    f.write(os.environ['CERTBOT_VALIDATION'])
    f.close()

    s3object = ".well-known/acme-challenge/" + os.environ['CERTBOT_TOKEN']
    upload_file("/tmp/verification.txt", os.environ['CERTBOT_DOMAIN'], s3object)
    os.remove("/tmp/verification.txt")