User management - Login & Registration

[bmariesan]

• All users should be able to login with username and password
• All users should be able to login with email and password
• Initial Teacher login should be done with an authentication token
• Students should be able to register an account without restriction
• Registration process should gather student information such as: user address(country, city etc.), phone number, age, gender,
• Teachers should receive invitation tokens via email.
• Invitation tokens can be sent by Admins only