* * Authorizes a user's request to access a live session via userId and sessionId.

* * Creats a live session based on user's id from JWT token and the documentId * of the document they are creating a live session for.

* * Constructs Live Session URL **/.

* * TODO: Update to emailing the user the live session or adding it to their personal docs.

* * Gets an exiting live session based on userId and documentId.

* * Invites a user to join a live session based on invitee's user id, the target user's * user's email, and the documentId in which they are sending the invite from.

* * Queries for live sessions that the user is part of.