Function AddToWalletButton

Example

 <AddToWalletButton
   testEnv={true}
   style={styles.myButtonStyle}
   iOSButtonStyle="onLightBackground"
   cardDetails={{
     primaryAccountIdentifier: "V-123",
     name: "David Wallace",
     lastFour: "4242",
   }}
   ephemeralKey={myEphemeralKey} // This object is retrieved from your server. See https://stripe.com/docs/issuing/cards/digital-wallets?platform=react-native#update-your-backend
   onComplete={(error) => {
     Alert.alert(
       error ? error.code : 'Success',
       error
         ? error.message
         : 'Card was successfully added to the wallet.'
     );
   }}
 />
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