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`publishableKey` prop required in Expo `ClerkProvider`

packages/upgrade/src/versions/core-3/changes/expo-publishable-key-required.md

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Original Source

The publishableKey prop is now required in ClerkProvider for Expo apps. Previously, it would fall back to the EXPO_PUBLIC_CLERK_PUBLISHABLE_KEY or CLERK_PUBLISHABLE_KEY environment variables, but environment variables inside node_modules are not inlined during production builds in React Native/Expo, which could cause apps to crash in production.

diff
+ const publishableKey = process.env.EXPO_PUBLIC_CLERK_PUBLISHABLE_KEY!;

- <ClerkProvider>
+ <ClerkProvider publishableKey={publishableKey}>
  </ClerkProvider>