updated inital DB setup setupDB.sh

[Rishabh-Singh-Codes]

PR Fixes:

• 1 In the initial DB setup, when we ask for db's username, the script prompts Enter your db password: which creates confusion and error while setting up. Updated that to Enter your db username:

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I assure there is no similar/duplicate pull request regarding same issue