In Fastbase…. Click on your profile picture and click the “Invite User” button.
Then select Permission, ‘Invite with Full Access’ (the invited user will get access for all Websites) or ‘Invite with Restricted Access’ (the invited user is granted access for selected Website(s) only). Once you selected Permission, enter the email id of the user who you want to invite and click on the ‘Invite User’ button.
Once you get the message ‘Invitation sent successfully’ then ask the invited user to create a password via the invitation link from his/her mail inbox (like this): in the invitation link click on the ‘Sign in to leads’ button and you will be redirected to a new page to create a password. Once you create password it will automatically redirect to Fastbase.