ensure that users are cached when they are retrieved

[blizzz]

this got lost during the performance changes (sic!), but now comes with a unit test 😊

Basically you see an additional request on LDAP after getting a user list (even on login) that checks for existence of the user. The data is fresh from LDAP however and can be cached right away to avoid this additional requests.

@nextcloud/ldap

[codecov]

Codecov Report

Merging #7418 into master will decrease coverage by 23.65%.
The diff coverage is 0%.

@@ Coverage Diff @@## master #7418 +/- ##
=============================================
- Coverage 50.93% 27.27% -23.66% - Complexity 24710 24712 +2 
=============================================
Files 1586 1522 -64 Lines 94144 86415 -7729 Branches 1364 0 -1364 =============================================
- Hits 47948 23568 -24380 - Misses 46196 62847 +16651

Impacted Files	Coverage Δ	Complexity Δ
apps/user_ldap/lib/Helper.php	29% <ø> (-9%)	34 <0> (ø)
apps/user_ldap/lib/Access.php	0% <0%> (-26.29%)	315 <0> (+2)
lib/private/DB/OCSqlitePlatform.php	0% <0%> (-100%)	5% <0%> (ø)
lib/private/Files/Cache/Wrapper/JailPropagator.php	0% <0%> (-100%)	1% <0%> (ø)
lib/private/SystemTag/ManagerFactory.php	0% <0%> (-100%)	3% <0%> (ø)
lib/private/Share20/Hooks.php	0% <0%> (-100%)	3% <0%> (ø)
apps/files_trashbin/lib/Command/Expire.php	0% <0%> (-100%)	3% <0%> (ø)
apps/files_trashbin/lib/Hooks.php	0% <0%> (-100%)	3% <0%> (ø)
...yBuilder/FunctionBuilder/SqliteFunctionBuilder.php	0% <0%> (-100%)	1% <0%> (ø)
apps/user_ldap/lib/LDAPProviderFactory.php	0% <0%> (-100%)	2% <0%> (ø)
... and 443 more

[rullzer]

Yes please!

[MorrisJobke]

Tested and still works 👍