It's possible to invite users to your stable, this is useful if more people are involved with the stable.

To invite other users, navigate to "Invite users" through "Settings".

This is the overview with all invitations.
To invite someone to your stable, use the "Invite user" button.

After filling in the e-mail and the name you can select a role.
There are two roles:

Users can use all the functions in Stalmanager, except for changing stable settings.

An admin can do anything a user can, but the admin can also change the stable settings. 
An admin can also invite new users.

Use the "Send invite" button to send the invite.

The invited person will receive an e-mail with an link, the link is needed for joining the stable.