Write-API post as a Guest?

[dogs]

Hey!

Is it possible to post as Guest via the write API?

I tried to reply to a topic via:

const bodyParameters = {
  _uid: 0,
  content: "It works!"
};

But it does not work. Is it possible to post as a Guest and set a username with the request or is it only possible to use the write api with a existing uid?

Looking forward to your answers.