Updating User Core Account Details via API

[Deleted user]

Hello Atlassian Community,

I am looking for guidance on updating a user's core account details, specifically their username and email, through an API. As these details are managed via Atlassian accounts, I'm uncertain if there's a direct API endpoint available for this purpose.

Could anyone provide information or direct me to the appropriate resources/documentation for achieving this via API?

Thank you for your assistance!