small refactor for acls, extract user creation/get into function

[sjpotter]

No description provided.

[codecov-commenter]

Codecov Report

Merging #578 (67e75f8) into master (508b61b) will increase coverage by 0.18%.
The diff coverage is 94.05%.

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@@            Coverage Diff             @@
##           master     #578      +/-   ##
==========================================
+ Coverage   58.06%   58.24%   +0.18%     
==========================================
  Files          42       42              
  Lines       14719    14679      -40     
  Branches     1735     1731       -4     
==========================================
+ Hits         8546     8550       +4     
+ Misses       6173     6129      -44     

Impacted Files	Coverage Δ
src/redisraft.h	100.00% <ø> (ø)
src/redisraft.c	73.81% <90.00%> (+0.39%)	⬆️
src/config.c	43.28% <91.11%> (+1.59%)	⬆️
src/snapshot.c	84.11% <95.23%> (-0.04%)	⬇️
src/migrate.c	77.14% <100.00%> (ø)
src/raft.c	88.83% <100.00%> (+0.02%)	⬆️

... and 2 files with indirect coverage changes

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[fadidahanna]

Needs to fix 2 small style issues (see CI failure)