Deleting Local User
Follow the steps below to delete a local user:
Go to Settings > General > Users and Roles.
The Users and Roles page opens in the Users view. Hover over the local user you wish to be deleted, and then click the Ellipsis icon in the rightmost cell of the row.
In the resulting menu, click Delete.
In the dialog box that opens, click Delete again to delete the local user. The user will disappear from the list of users.