Account address fetch from Metamask for to dynamically register.

Description

Issue - For Login and Register, the account address is hard coded.

Fixes # (issue)
Resolve - Fetch the current address from Metamask wallet and then log in and register

Type of change

Please mark the options that are relevant.

• Improved the business logic of code
• Added a new feature

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings