When logged in to Textpattern with a publisher account, you will see options to change the password when editing any user account.

Configure Textpattern CMS’ user-group privileges through the Preferences panel.

Configure additional user biographical information to be collected when authors are created, then show that info as bylines against your Textpattern articles. Like custom fields for user info.

Manage users, groups and privileges from the Textpattern back-end.