Step 1: Go to your Project and access Terminal inside the Android Studio. You can access it by clicking the Terminal below the Android Studio.
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Step 2: You need to go to the android folder in your project. You can go there by simply typing cd android, then just type gradlew signingreport
and press enter.
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Step 3: Wait until your SHA-1 and SHA-256 appear like what the image shown below.
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