Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/Spomky-Labs/oauth2-server-token-endpoint/inspections/510e2e95-db89-4da0-aeee-f34c82e65305

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Merge pull request #4 from Spomky-Labs/scrutinizer-patch-1

Scrutinizer Auto-Fixes
Bug fixed
Merge pull request #5 from Spomky-Labs/develop

Bugs fixed