You can use API_KEY but cannot use DEVICE parameter to direct messages to specific devices.

Expected behaviour:

device parameter parameter used to direct notifications to specified devices....

Actual behaviour:

Generates message on Join device:
API Key Not Used
All Join API pushes now REQUIRE the API Key parameter. Please go to https://joaoapps.com/join/web and regenerate your API URL with the apikey parameter

Steps to reproduce:

• Step 1: Configure join notifier with devices
• Step 2: Trigger notify

Config:

          - join:
            device:
              devicekey1
              devicekey2```
  
#### Log:

Error while sending notification to join: User Not Authenticated

### Additional information:

- Flexget Version: 2.9.11
- Python Version: 2.7.12
- Installation method: pip
- OS and version: FreeBSD 11.0