feature(route guarding): incomplete

[mcspach]

Approach

Added new file guard.js to define a new component called GuardedRoute, which would check for authentication before rendering the component. Otherwise would redirect to login page.
I wanted to use this component to check if there was an active token, but my approach doesn't seem to be fully working.
'props.auth.token' returns undefined. I have attempted this task multiple times and there always seems to be a slight error. Not familiar enough with React to know the best practices here.

Links

https://www.freecodecamp.org/news/a-complete-beginners-guide-to-react-router-include-router-hooks/#guarding-routes
https://dev.to/karanpratapsingh/private-public-and-restricted-routes-in-react-42ff
https://medium.com/weekly-webtips/protect-your-route-with-protectedroute-and-guards-in-reactjs-2db83ec48860

Doesn't quite solve Shift3#21