Added Referral and Redeem Code Section.

Issue Number

fixes #279

Describe the changes you've made

Describe if there is any unusual behavior (Any Warning) of your code(Write NA if there isn't)

Additional context (OPTIONAL)

Test plan (OPTIONAL)

A good test plan should give instructions that someone else can easily follow.

Checklist

[x] My code follows the code style of this project.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.
[x] All new and existing tests passed.
[x] The title of my pull request is a short description of the requested changes.

Provide a Deployed link of route/page that needs to review Preview: Deployed preview link

codeforcauseorg / edu-client