Replaced throwing exceptions with logging and early exit

[Zenith-Kim-Light]

No description provided.

[codecov-commenter]

Codecov Report

Merging #10 into master will decrease coverage by 0.07%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master      #10      +/-   ##
============================================
- Coverage     18.53%   18.46%   -0.08%     
  Complexity      412      412              
============================================
  Files            41       41              
  Lines          1009     1013       +4     
============================================
  Hits            187      187              
- Misses          822      826       +4     

Flag	Coverage Δ	Complexity Δ
#unittests	18.46% <0.00%> (-0.08%)	412.00 <0.00> (ø)

Impacted Files	Coverage Δ	Complexity Δ
src/Listeners/SubscriptionListener.php	0.00% <0.00%> (ø)	11.00 <0.00> (ø)

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