clearAuthToken method
🔹 Clear token (logout)
Implementation
Future<void> clearAuthToken() async {
try {
_authToken = null;
final prefs = await SharedPreferences.getInstance();
await prefs.remove('auth_token');
print('🗑️ Token cleared from storage');
} catch (e) {
print('⚠️ Failed to clear token: $e');
}
}