REST API missing method for updating user endpoint

Hello all,
I have seen that some new REST API methods have been released in version 8.2. But what I am wondering is why there is no possibility to update the user endpoint?

For Jira, this endpoint has already been offered for a while - Jira REST API Documentation.

We often have to change the usernames because of weddings or something like that.

Why is the PUT method not available for the user endpoint in Confluence?