checkin - code for first 6 use cases

I have tried to work on the below use cases .

1. Signin/ Signout / User credential verification  - Done
2. Borrow Item  - Done
3. Return Item  - Done
4. Checkout    - Done
5. Purchase Item  - Done
6. Generate Report - In progress
7. Notification - In progress

Have not started on the below
1. Bid item.