> For the complete documentation index, see [llms.txt](/llms.txt)

# GS2-Auth API Reference

Authentication feature




GS2-Auth is a service that issues "access tokens" to identify game players within GS2.




- [GS2-Auth SDK API Reference](/api_reference/auth/sdk/)
  
- [GS2-Auth SDK for Game Engine API Reference](/api_reference/auth/game_engine/)