Authentication

Hello,
Couple of questions:

1) It seems that the authorization token (JSON web request) is not being kept after ‘save chart’. When we are configuring the chart itself, all the data is properly shown. When we click on ‘Save chart’, all data is gone. When we reconfigure the chart, we see that only the first character of the token is being saved.
If we disable the authorization token from our API, the graph does work.

2) Is there a way to set a default text when there is no data available in a PIE chart? (the API returns [ { amount = 0}, {amount = 0}])

Kind regards,