You can create and edit contacts in the Contacts tab. You can create a new profile using the top-right drop down, or view an existing user and select “Edit” in the top right action area of their profile.
Any new profile you create will require the user to login using that email (with by setting a password, or using a Facebook account linked to the same email). For security purposes, we are unable to perform password tasks on behalf of users (e.g. advising what a password is, or resetting it). New and existing users can (re)set their password on the login screen. Users will be required to verify that they own the email they are using to login by clicking a link sent to their email.