Default message not working?

[JoaoCnh]

I've tried running the action with no args to replicate the embed example in the README but no messages is being sent.
What is required to send that message?

[chrissound]

Yup having just:

      - name: Actions for Discord
        uses: Ilshidur/action-discord@0.3.2
        if: always()
        env:
          DISCORD_WEBHOOK: ***

Does not make it run anything for me, the step is not even shown in github actions.