[1.5] Testcases for insert user (RU*, PG*)
[1.5][Refactor] Refactoring DBConnection Class (RU*, PG*)
[1.5][+Refactor] Implementation for Registration insertion to database and refactoring testcases (RU*, PG*)
[1.5] Calling Registry for Result and returning userid (RU*, PG*)
[1.5]merging master to Register (RU, PG)