A utility tool to generate Vivox access tokens on the fly.
Note: Not perfect code.
Useful alongside with: https://jwt.io/
Implementation based on this public documentation for access token generation: https://docs.unrealengine.com/4.26/Attachments/ProductionPipelines/VivoxPlugin/VivoxIntegrationGuide/UE4.21%20Access%20Token%20Dev%20Guide.pdf