Add return statement

[dbyrns]

Found that while setupping a dev env. Probably never caused an issue before because the MAGPIE_LOG_LEVEL was always defined.

[codecov-io]

Codecov Report

Merging #191 into master will decrease coverage by 0.04%.
The diff coverage is 13.33%.

@@            Coverage Diff             @@
##           master     #191      +/-   ##
==========================================
- Coverage   71.99%   71.94%   -0.05%     
==========================================
  Files          94       94              
  Lines        6773     6779       +6     
==========================================
+ Hits         4876     4877       +1     
- Misses       1897     1902       +5

Impacted Files	Coverage Δ
magpie/utils.py	61.5% <ø> (ø)	⬆️
magpie/definitions/typedefs.py	0% <0%> (ø)	⬆️
magpie/constants.py	94.4% <100%> (+0.04%)	⬆️
magpie/services.py	44.04% <7.69%> (-0.72%)	⬇️

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[fmigneault]

@dbyrns
I've added the changes returning Permission enum as discussed.