I am new using Watson cognitive package and have a problem when try to use it. The parameters that the activity receives are a key (is a token that I get from the bluemix service that I created) and the text I want to analyze. The problem is that when I want to see the output (RawResult, the Language and the Error), it turns out that they are null. The token it is just a string or must be like a JSON in a string? I am not pretty sure I am using the token correctly, can someone give me an example of how is it?