Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/Spomky-Labs/oauth2-server/inspections/71c628b1-c3cd-4e08-afa8-99a672e2c37e

Enabled analysis tools:
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 - PHP Mess Detector
 - PHP Code Sniffer
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Merge pull request #8 from Spomky-Labs/scrutinizer-patch-1

Scrutinizer Auto-Fixes