How can I connect alexa with recast.ai chatbot using powershell : I have build a chatbot with recast.ai and now want to connect it with alexa, so that the requests from alexa are integrated in recast.ai. Therefore I want to use 
"REQUEST_TOKEN=xxxxxxxxx npm start" in windows powershell in order to send the requests to my server.

Then, I get the following error message:
[enter image description here][1]


  [1]: https://i.stack.imgur.com/mddhI.png

Do you know how I can solve this problem instead?

Thank you very much for answering