Feature: Login data

[thybag]

Keep track of successful account logins in order to facilitate debugging any misuse.

• Create Login Model under User
• Migrate to create user_logins table - should contain id, user_id(fk), ip, user_agent, timestamps
• Make Logins relation of User (User hasMany Logins).
• Every time a user logins in successfully, create a new Login model with the above data