Auth0 integration

[JessWillCode]

Description

Auth0 has been integrated into the backend application to replace okta. An API was created in the Auth0 portal, environment variables have been updated, and routers have been tested.

Fixes # (issue)
Auth0 was not being used in the backend after the removal of okta.

Loom Video

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have removed unnecessary comments/console logs from my code
• I have made corresponding changes to the documentation if necessary (optional)
• My changes generate no new warnings
• I have checked my code and corrected any misspellings
• No duplicate code left within changed files
• Size of pull request kept to a minimum
• Pull request description clearly describes changes made & motivations for said changes