/// Custom exceptions for the application
class ServerException implements Exception {
  final String message;
  ServerException([this.message = 'Server error occurred']);
}

class CacheException implements Exception {
  final String message;
  CacheException([this.message = 'Cache error occurred']);
}

class NetworkException implements Exception {
  final String message;
  NetworkException([this.message = 'Network error occurred']);
}

class ValidationException implements Exception {
  final String message;
  ValidationException([this.message = 'Validation error occurred']);
}

class NotFoundException implements Exception {
  final String message;
  NotFoundException([this.message = 'Resource not found']);
}

class UnauthorizedException implements Exception {
  final String message;
  UnauthorizedException([this.message = 'Unauthorized access']);
}

class AuthenticationException implements Exception {
  final String message;
  AuthenticationException([this.message = 'Authentication failed']);
}

class InvalidCredentialsException implements Exception {
  final String message;
  InvalidCredentialsException([this.message = 'Invalid email or password']);
}

class TokenExpiredException implements Exception {
  final String message;
  TokenExpiredException([this.message = 'Token has expired']);
}

class ConflictException implements Exception {
  final String message;
  ConflictException([this.message = 'Resource already exists']);
}