I have created a couple of Group Channels in my application through the Dashboard but I can’t find the way to make them public so the clients can fetch them without the user having to be a member.
Is there a console in the dashboard where I could execute the code you posted above to create a public group channel without having to do it through a client?
There is no way to create a public group via the dashboard. The easiest way would be to use the Platform API and a tool like Postman, where you only have to write a little JSON.
We are currently working on a Public postman workspace and hope it have it out in the next week or two. Until then, you could easily create your own.