Automate HackerRank assessment invitations via the HackerRank for Work API

Steps

1. Obtain your HackerRank for Work API key from the account settings in your HackerRank for Work dashboard; the API base URL is https://www.hackerrank.com/x/api/v3
2. Identify the test ID for the assessment you want to send; retrieve it by calling GET /tests to list all tests in your account
3. To invite a candidate, send POST /tests/{testId}/invitations with a JSON body containing at minimum the candidate's email and, optionally, their name; this triggers an invitation email to the candidate
4. Poll GET /tests/{testId}/candidates or GET /invitations/{invitationId} to check the invitation and result status; states include pending, started, and completed
5. When the status is completed, retrieve the candidate's score and report via GET /tests/{testId}/candidates/{candidateId} or by accessing the invitation's result URL in the response
6. Handle pagination on list endpoints using the limit and offset query parameters