Implementation of the Google OAuth on the frontend

[mayura-andrew]

Describe the bug Although the user login view has been implemented in #5, the Google OAuth button and authentication process have not been implemented.

To Reproduce Steps to reproduce the behavior:

1. Go to home
2. Click on "Become a mentor" button
3. Scroll down to bottom
4. See error

Expected behavior Need you display that Google Sign in button in this Login modal

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

Are you working on it? Yes