[Backport 1.2] Username validation for special characters (#2277)

[rutuja-amazon]

Description

Username validation for special characters (#2277)

• Only prevent user creation on colon characters, separate out tests

Signed-off-by: Rutuja Surve [email protected]
Signed-off-by: Rutuja Surve [email protected]
Signed-off-by: Peter Nied [email protected]
Co-authored-by: Peter Nied [email protected] (cherry picked from commit efbc48b)

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (1.2@ceb32ce). Click here to learn what that means.
The diff coverage is n/a.

@@          Coverage Diff           @@
##             1.2    #2332   +/-   ##
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  Coverage       ?   64.87%           
  Complexity     ?     3235           
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  Files          ?      247           
  Lines          ?    17348           
  Branches       ?     3076           
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  Hits           ?    11255           
  Misses         ?     4537           
  Partials       ?     1556           

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