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1. Google Play settings must be added to the Game Center.

2. To use Kakao Login on Android, you need to register a key hash.
   https://kakaogames.atlassian.net/wiki/spaces/KS4GFC/pages/767754241/Android#1.2.5788925018/Android+SDK+Installation#5.-%ED%82%A4Key-%ED%95%B4%EC%8B%9CHash-%ED%99%95%EC%9D%B8Verification-%EB%B0%8Fand-%EB%93%B1%EB%A1%9DRegistration-%EB%B0%A9%EB%B2%95Method

3. If setting in the Game Center, register the key hash under [Game Center App Selection → Game Market Information → Google Play → Key Hash].

4. If setting on the Kakao Developer Site, register the key hash under [Application Selection → Platform → Android].

   

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