Check max users on user creation

Summary

• fix: check max users on user creation

• test: role and user limits

Due to the fact that we don't use two stage commit for ACL, we have to check all the ACL preconditions both in SQL preprocessing (as a short circuit) and in CAS (for consistency), also CAS can be called directly

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• Close #1208 (closed)
• Cherry-pick to: none
• Docs follow-up: not necessary
• Changelog is updated

assigned to @e-ivkov

added 12 commits

• 651dce72...94c5755f - 10 commits from branch master
• 0a91b10a - test: role and user limits
• 819ceb69 - fix: check max users on user creation

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changed title from Draft: check max users to Draft: Check max users on user creation

marked the checklist item Changelog is updated as completed

changed the description

requested review from @d.rodionov

marked this merge request as ready

added 7 commits

• 819ceb69...43b6a935 - 5 commits from branch master
• 054f566a - test: role and user limits
• 529dccd2 - fix: check max users on user creation

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added 3 commits

• 1f8448e7 - 1 commit from branch master
• 7abadf30 - test: role and user limits
• ea776b53 - fix: check max users on user creation

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Two minor comments. Do we explain 32 vs 26 in our docs?

approved this merge request

Do we explain 32 vs 26 in our docs?

Yes

added 21 commits

• ea776b53...a11fab4f - 19 commits from branch master
• aa2f874e - test: role and user limits
• 63cc4ab8 - fix: check max users on user creation

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resolved all threads

enabled an automatic merge when the pipeline for 63cc4ab8 succeeds

aborted the automatic merge because target branch was updated

added 3 commits

• 3bb6d155 - 1 commit from branch master
• cb9702b0 - test: role and user limits
• 9a52b0fd - fix: check max users on user creation

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enabled an automatic merge when the pipeline for 9a52b0fd succeeds

aborted the automatic merge because target branch was updated

added 15 commits

• 9a52b0fd...dded2b2b - 13 commits from branch master
• abb23911 - test: role and user limits
• 484a32ed - fix: check max users on user creation

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resolved all threads

merged