Unable to add multiple pCloud accounts

### Please agree to the following

- [X] I have searched [existing issues](https://github.com/cryptomator/ios/issues?q=) for duplicates
- [X] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/ios/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

pCloud authentication skips asking for credentials if it's already logged in.

### System Setup

- iOS: 16.3
- Cryptomator: 2.4.6

### Cloud Type

pCloud

### Steps to Reproduce

1. Add pCloud connection and log in
2. Add another pCloud connection

### Expected Behavior

I can enter a different set of credentials.

### Actual Behavior

pCloud authentication window opens and instantly closes because it remembered the authentication from the first step.

### Reproducibility

Always

### Relevant Log Output

_No response_

### Anything else?

## Workaround

1. Go to iOS Settings
2. Select "Safari"
3. Select "Advanced" at the bottom
4. Select "Website Data"
5. Search for "pcloud" and delete entry (by swiping to the left)