## Description
Adds user management capabilities to our current API. Allows for adding,
removing, listing and updating members of a given team using a valid API
token.
## Related Issue
N/A
## Changes Made
- Added an endpoint for inviting a team member
- Added an endpoint for removing a team member
- Added an endpoint for updating a team member
- Added an endpoint for listing team members
## Testing Performed
Tests were written for this feature request
Extracts the API implementation to a package so we can
potentially reuse it across different applications in the
event that we move off using a Next.js API route.
Additionally tidies up the tokens page and form to be more simplified.
