Summary

Fix OAuth callback error message

Explanation

The OAuth callback error was not displaying the provider name in the message.

when using a config like this, without Label:

return [
    'middleware' => ['web'],
    'prompt' => 'Or Login Via',
    'providers' => [
        Providers::github(),
    ],
];

Checklist

• I've read this template
• I've checked reviewed this PR myself, ensuring consistency and quality with the rest of the project
• I've given a good reason as to why this PR exposes new / removes existing user data