Azure Data Catalog Rest API with Postman?

Hello, 

one of our developers is trying to use the Azure Data Catalog API in conjunction with Postman. I have forwarded him documentation on how to use the API in Visual Studio, but he would like to use it with postman instead. We can get as far as obtaining our access token, but access is denied when trying to access our catalog through the API with Postman. It does work when using the visual studio solutions provided in the examples here https://azure.microsoft.com/en-us/resources/samples/?service=data-catalog&sort=0