Add authentication to load tests

[rhysyngsun]

What are the relevant tickets?

Part of https://github.com/mitodl/hq/issues/11039

Description (What does it do?)

This adds code that logs the tests in via Keycloak so they can poke around as an authenticated user.

How can this be tested?

• Create a file for test user auth info in load_testing/data/ (e.g. load_testing/data/users.json) per the readme instructions.
• Run the load tests with user auth:

  k6 run learn.smoke.ts \
    -e BACKEND_BASE_URL=https://api.learn.odl.local \
    -e FRONTEND_BASE_URL=https://learn.odl.local \
    -e USERS_JSON_FILE=data/users.json \
    -e SSO_BASE_URL=https://keycloak.odl.local \
    -e IGNORE_HTTPS_ERRORS=true \
    --console-output test.log

• Inspect the output in test.log, you should see log statements regarding successful logins

[github-actions]

OpenAPI Changes

No changes detected

View full changelog

Unexpected changes? Ensure your branch is up-to-date with main (consider rebasing).