You can handle this by wrapping your Stripe API calls in a try-catch block and catching the Stripe\Exception\AuthenticationException which is thrown when the API key is incorrect.
Here's an example of how you can do this:
<?php
use Stripe\Exception\AuthenticationException;
try {
// Replace this with your Stripe API call
\Stripe\Stripe::setApiKey($userApiKey);
$paymentIntent = \Stripe\PaymentIntent::create([
'amount' => 1000,
'currency' => 'usd',
]);
} catch (AuthenticationException $e) {
// The API key is invalid
// You can redirect to a custom error page here
return redirect()->route('custom.error.page')->with('error', 'Invalid Stripe API Key provided.');
} catch (\Exception $e) {
// Some other error occurred
return redirect()->route('custom.error.page')->with('error', 'An error occurred while processing your payment.');
}
?>
In the above code, if the API key is invalid, a Stripe\Exception\AuthenticationException will be thrown. We catch this exception and redirect to a custom error page with an error message. If some other error occurs, we catch it with a general \Exception and also redirect to the custom error page.
Remember to replace 'custom.error.page' with the actual route name of your custom error page, and replace the Stripe API call with the actual call you're making.
