ApiException class

Exception thrown when an API request fails.

This exception is thrown by MailValidationClient methods when:

• The API returns an error response
• Network errors occur
• Authentication fails
• Rate limits are exceeded

Example:

try {
  await client.validateEmail('test@example.com');
} on ApiException catch (e) {
  if (e.statusCode == 401) {
    print('Invalid API key');
  } else if (e.statusCode == 402) {
    print('Insufficient credits');
  } else {
    print('Error: ${e.message}');
  }
}