You can delete a user's permissions, leaving them with basic login permissions.

1. In the top-left corner, click your site name then Giving. Then click Users & Permissions > Users.
2. Click then Delete next to the user whose permissions you want to delete.
   The user will still be able to log into the site but without his or her previous access to certain areas. You will be given the chance to reassign any saved reports the individual created. Only users with permission to run the reports will display in the drop-down list.