2.4.1 Login

When the user decides to enter a lecture, they are directed to the login screen. When users login, there are presumably signing in and anouncing themselves as being in the class session. If the class is not in session at the time, others may choose to view saved lectures and instructors may grant permissions to whom they wish to view.
Figure 1: Login
When the user is not granted permission to view the lecture, they are asked to re-enter their username and password. If still unsuccesful, the user would need to contact the instructor to verify they have been given permission to view.
Figure 2: Unsucessful Login
When the username and password is accepted, they are directed to the user interface