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