Just add ----> SendDiscordMessage(); above SendEmbedDiscordMessage(); on line 36 and 98 inside the .cs file like this (image below).

However line 36 is not really necessary but it wont show up when using the /dwatest command.
Then add @everyone in your WipeMessage inside your .json file.
I got it working and now it looks like this:

I know, it sucks that whenever you use @everyone inside the embeded message it wont pop up as a notification, only as a blue useless mark :/
Late answer, but better late than never. Hopefully this will help atleast a few, as I found it pretty annoying not being able to mention everyone properly with the embedded message, discord being discord..