Login / Signup workflow

[koustuvsinha]

This is an epic issue to track the development of Login & Signup workflows. Sub issues :

• Create Login Screen - Create Login Screen #5
• Create Signup Screen - Create Signup screen #6
• Allow social logins / signups - Allow Social Login / Signups #7
• OTP Verification - OTP Verification #8
• Handle user account functions - Handle user account functions #9