Authorization and Authentication implementation

[andrejste7]

Description

To make our project secure and divide teachers from students and disallow strangers, we need a mechanism to separate teachers from students and dissalow direct access.

TODO

• Propose and create a method to distinguish logged users from unauthorized

[andrejste7]

No specific options to register, but we are be able to prevent unauthorized access to pages before selecting the role in home screen. Also we have a method to separate teachers from student.