To modify existing users on Jatheon Cloud, you will need to log in as a user who has the Edit user permission enabled (by default, these are either Account Admin or MSP Admin).
First, head over to the Users section in the side menu and find the user you want to modify.
Click Edit (the option will show up once you hover over the user's row).
Change any of the existing values and save the changes by clicking the Save button.
A success toast notification will show up, confirming that you have successfully edited a user.