검색해 보면 DEVELOPER_ERROR는 무조건 SHA-1 키 때문이라고 하던데,, 나는 잘 입력한 것 같은데 계속 안되길래 머리가 지끈했다.결론 : 공식문서 잘 보자https://react-native-google-signin.github.io/docs/setting-up/get-config-file Obtaining configuration information | React Native Google Sign InBefore getting your hands dirty with code, some configuration needs to be taken care of. Be patient, this is the most complex part of the setup.react-native-googl..