Enable single sign on for React app through People Depot

[ethanstrominger]

Dependency

• Create React frontend that uses SSO #533

Overview

As a user, I want to be able to log into all HackForLA apps using single sign on.

Technical Details

I wrote a React App to use PeopleDepot with single sign on. To make this work, I had to change certain files.
Technical details of changes made are in the pull request for this issue.

[vanessaavviles]

Please provide update

1. Progress: "What is the current status of your project? What have you completed and what is left to do?"
2. Blockers: "Difficulties or errors encountered."
3. Availability: "How much time will you have this week to work on this issue?"
4. ETA: "When do you expect this issue to be completed?"
5. Pictures or links* (if necessary): "Add any pictures or links that will help illustrate what you are working on."

• remember to add links to the top of the issue if they are going to be needed again.

[fyliu]

Updated description to add dependency of #533 before the PR for this issue is testable.