issues for final result and use

[Anastasiiasyvak]

• [ ] ready code
• [ ] created integration tests
• [ ] created unit tests
• [ ] created E2E tests
• [ ] Implemented an endpoint that returns total time that user was online
• [ ] Implemented endpoints that returns average daily/weekly time for the specified user
• [ ] Implemented endpoint to follow the EU regulator rules - GDPR - right to be forgotten