How can the "Bad credentials" error message in PHP be resolved when using Silex for authentication?

The "Bad credentials" error message in PHP when using Silex for authentication typically occurs when the provided username or password is incorrect. To resolve this issue, double-check the credentials being used for authentication and ensure they are correct.

// Example code snippet to resolve "Bad credentials" error in Silex
$app->post('/login', function (Request $request) use ($app) {
    $username = $request->get('username');
    $password = $request->get('password');

    // Perform authentication logic here
    if ($username === 'correct_username' && $password === 'correct_password') {
        // Authentication successful
        return $app->json(['message' => 'Login successful']);
    } else {
        // Authentication failed
        return $app->json(['message' => 'Bad credentials'], 401);
    }
});