Update user avatar_template via API

Hello!!! I want to update the avatar of the forum from the website that manage the user, this image is in a S3 bucket.
https://docs.discourse.org/#tag/Users/operation/updateUser
I’m trying that endpoint but when I do the tests via postman is not working anything, any clue why is happening?

Welcome :slight_smile:

Can you share your payload?
What does postman return?

Thanks for the welcome!
The postman return a 200 ok status and in the body:

{
"success": "ok",
"user":{
same data without alteration
}
}

In the PUT petition I have this in the body:

{
"avatar_template": "S3_URL"
}