# Participant user doesn't exists

**URL:** <https://devforum.zoom.us/t/participant-user-doesnt-exists/70241>\
**Category:** Reports and Dashboards\
**Created:** [June 9, 2022, 1:27pm UTC](https://devforum.zoom.us/t/participant-user-doesnt-exists/70241 "2022-06-09T13:27:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nello.nepi](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/nello.nepi/32/38352_2.png) [@nello.nepi](https://devforum.zoom.us/u/nello.nepi)\
**Post date:** [June 9, 2022, 1:27pm UTC](https://devforum.zoom.us/t/participant-user-doesnt-exists/70241/1 "2022-06-09T13:27:55Z")

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Hello.  
I have a problem using the Get User API.  
First of all i retrieve the list of the participants of a specific meeting.  
When i try to retrieve the user via ID, i obtain this error:  
{  
“code”: 1001,  
“message”: “User does not exist: userId”  
}

How is it possible that the system is returning a user which no exists?  
I am using server-to-server Oauth2 authentication.  
Thanks

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<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [June 10, 2022, 9:26pm UTC](https://devforum.zoom.us/t/participant-user-doesnt-exists/70241/2 "2022-06-10T21:26:03Z")

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Hi @nello.nepi

Thanks for reaching out to the Zoom Developer Forum and welcome to our community!  
Have you tried passing the email of the user instead of the userID?

Let me know if that helps  
Cheers,  
Elisa