Each GPS tracker is represented as a user in MapSphere. There are 3 possibilities depending on your needs.
You can associate your own account with the tracker to allow other users track you. Note that you will not be able to log in MapSphere using the same account and view your tracker movement.
You can create a separate account for your tracker. For a unique e-mail address, you can use firstname.lastname@example.org where 12345678901234 is the IMEI code of your device.
You can give the GPS tracker to another MapSphere user. This can be your friend, your child or a relative. You will need to ask this user to specify tracker IMEI in his/her profile. To give the tracker: