Requests not returned via ServiceDesk API


I have over the past few days been working with the Jira Service Desk rest API in an attempt of accessing all customer requests sent to a specific service desk. When calling the api using the below resources I end up with no values

In an attempt to see if I could view any requests I tried to just call one of the requests in the service desk using the following URI:

When doing it this way, the API is returning “You do not have permission to view this request”. Is this why I do not get any values when calling the API using the first URL?

Many thanks!