Ticket 173 - updated email verification link expiration time

[johnLeavell]

Zenhub Link:

https://github.com/the-difference-engine/ksf/issues/173

Describe the problem being solved:

Updated the email verification link from 24hrs to 7 days.

Impacted areas in the application:

Api/helper/generateToken.js

Describe the steps you took to test your changes:

Changed the expiresIn property from 1d to 7d

If this ticket involves any UI or email changes, please provide a screenshot that shows the updated UI

List general components of the application that this PR will affect:

PR checklist

• [x] I have linked the PR to a Zenhub ticket
• [x] I have checked for merge conflicts