At this time, the system is only set up to account for one user. Each user would need his/her own account. If you are sharing students - data doesn't store on the server under one student name/i.d. - rather, it would be like you each have your own digital file on the student.
You are able to be signed into one account from up to two different devices, so if an SLPA was taking data and the SLP supervisor needed to login to review, that would be okay. But if two users are trying to collect data (e.g. session data, giving tests, etc.) at the same time, the account gets corrupted as the server doesn't recognize which data to store.
Some subscribers utilize paper data sheets as well, which can be found in the Reports tab under 'Data collection sheets'.