You could check with a get action event, if the user already has an account:
And if it’s the case, you run a path where you add this user to a group using a put action:
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Awesome Krischan ! Thanks for your quick reply ! I’m trying it right now.
The Get part seems to work.
But I have an issue on the Put action :
1 / Can you tell me which Content-type do I have to put in header ?
(I guess I still add my API Username and API Key)
2/ On the URL of the Put Action, do I have to use the group ID (in number, like 110 in your example), or can I use the name I can get on the URL of the groupe ? (like “course-A” for example)
I tried to use the Name of the groupe (I don’t know where can I get the group ID) and it doesn’t seems to work.
Thanks ! 
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Content type: multipart/form-data
No, I guess you have to use the group ID. You can get it eg. from the json file: https://meta.discourse.org/g.json
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Awesome, with this content type + group ID, it seems to work !
Thanks for your quick help Krischan!
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Hi Krischan ! 
Do you know if there is a way to notify the user by email to tell him he has been added to a group (with the Discourse API on Zapier) ?
I know it’s possible to tick a box, when we manually add email to a group on Discourse.
It could be good if I could trigger an email when my Zap is adding them to a new group.
Thanks !
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Thanks for your reply @Krischan !
Do you see a quicker way to notify the user ? (It’s ok if it’s a basic message from discourse, just like the one the user receives if I tick the checkbox “notify the users.”
Your solution is great, but as I have a lot of groups and automations, it could be great if I could just add “one” data type, for example to just “activate” the notification, instead of creating 30 new zap 
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Sorry, I haven’t done this yet. But maybe this post can help you:
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Thanks for your reply Krischan !
I will check that
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Hi guys
Do you know if there is a way to Remove a member from a group, using the same logic explained upper ?
I noticed the API has a way to Delete group member : Discourse API Docs
But I’m not sure how to use it on Zapier 
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Hello,
I need some help here. I’ve followed all the instruction and the link was created. However, the link is not assign to an e-mail. The e-mail field is empty and the user don’t receive any e-mail.
See:
The results:
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Has anyone had error messages on their email invite zap’s recently? In my case I get 403 and 404’s and some invites are not sent out successfully
It sounds like a permission issue with either the Api-Key or Api-Username. Try checking both of those on your Discourse site. Make sure that the user you have supplied for the Api-Username is still active on the site and that the Api-Key has either the Global scope, or has a Granular scope with the Invites scope box checked.
Let us know if that doesn’t fix the issue.
I’m bumping Juliano’s message because I tried this just now and experienced the same thing. How do I ensure that the invitation I create is an email invitation? I seem to be able to create only link invitations, although those work just fine.
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A little update on this, since I’m trying again.
Zapier’s Discourse integration app appears to have a defect: it maps both the “email” and the “skip_email” POST request body value to the same key: “skip_email”. This results in Discourse receiving an HTTP POST request with no “email” item in the request body, so the invite is created as a “link” invite rather than an “email” invite.
I’m sending Zapier a support email. We’ll see what happens. 
If I use Zapier’s generic Webhook feature, I can create the invitation, but Discourse isn’t sending the email, so I need to figure out why not. I’ll follow up when I learn more.
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