Common Voice 8 doesn't show datasets viewer
OK, thanks for digging a bit into it. Indeed, the error occurs with the dataset-viewer, but not with a normal user token, because we use an app token, and it does not have a related email!

```python
>>> from huggingface_hub import HfApi, HfFolder
>>> auth_token = "hf_app_******"
>>> t = HfApi().whoami(auth_token)
>>> t
{'type': 'app', 'name': 'dataset-preview-backend'}
>>> t["email"]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: 'email'
```

Note also that the doc (https://huggingface.co/docs/huggingface_hub/package_reference/hf_api#huggingface_hub.HfApi.whoami) does not state that `whoami` should return an `email` key.

@SBrandeis @julien-c: do you think the app token should have an email associated, like the users?
https://huggingface.co/datasets/mozilla-foundation/common_voice_8_0
Common Voice 8 doesn't show datasets viewer 
 https://huggingface.co/datasets/mozilla-foundation/common_voice_8_0 
 OK, thanks for digging a bit into it. Indeed, the error occurs with the dataset-viewer, but not with a normal user token, because we use an app token, and it does not have a related email!

```python
>>> from huggingface_hub import HfApi, HfFolder
>>> auth_token = "hf_app_******"
>>> t = HfApi().whoami(auth_token)
>>> t
{'type': 'app', 'name': 'dataset-preview-backend'}
>>> t["email"]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: 'email'
```

Note also that the doc (https://huggingface.co/docs/huggingface_hub/package_reference/hf_api#huggingface_hub.HfApi.whoami) does not state that `whoami` should return an `email` key.

@SBrandeis @julien-c: do you think the app token should have an email associated, like the users?