Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
fitbit is not liable for any loss or damages caused by your failure to maintain the confidentiality of your account credentials . 

```
. OPTIONS: ['Arbitration' 'None' 'Unilateral termination' 'Contract by using'
 'Choice of law' 'Content removal' 'Jurisdiction'
 'Limitation of liability' 'Unilateral change'].