[LuisFigueroaG]

The Server client has get_user_details_by_accountid(accountid, expand=None), but the Cloud client (Confluence(url="https://<site>.atlassian.net") / ConfluenceCloud) doesn't, so the call fails with:

AttributeError: 'Cloud' object has no attribute 'get_user_details_by_accountid'

This adds it to Cloud with the same arguments as the Server method. It calls get_user() (fixed in #1715), so it sends:

GET /wiki/rest/api/user?accountId={accountid}

with expand added when given. That's getUser in the Cloud v1 users reference, which takes accountId and expand (operations, personalSpace). Like the Server method, a 403 raises ApiPermissionError and a 404 raises ApiNotFoundError.

I didn't add get_user_details_by_username or get_user_details_by_userkey to Cloud, since Cloud no longer accepts username or key on that endpoint.

docs/confluence.rst didn't list get_user_details_by_accountid yet, so I added it under "Users and Groups" with a note that the Cloud client has it too.

Tests: added five test_get_user_details_by_accountid* tests to tests/confluence/test_confluence_cloud.py. They cover the request params, the final URL with expand (https://test.atlassian.net/wiki/rest/api/user?expand=personalSpace&accountId=557058%3Af58131cb), the 403/404 errors, and a call through Confluence(url="https://test.atlassian.net"). All five fail on master with the error above. The full pytest suite, tox -e mypy, bandit and doc8 pass, and black and flake8 are clean on the changed files. I haven't run it against a real Confluence Cloud site.

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.48%. Comparing base (d659afe) to head (8b5e62d).

Files with missing lines	Patch %	Lines
atlassian/confluence/cloud/__init__.py	80.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1716   +/-   ##
=======================================
  Coverage   65.47%   65.48%           
=======================================
  Files         107      107           
  Lines       19426    19436   +10     
  Branches     2127     2129    +2     
=======================================
+ Hits        12720    12728    +8     
- Misses       6000     6001    +1     
- Partials      706      707    +1     

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