And you get below error?
System.Net.WebException: The remote server returned an error: (404) Not Found.
Response Url: https://www.googleapis.com/webmasters/v3/sites/https://zappysys.com/searchAnalytics/query
Status Code: NotFound
Notice that in Request URL %2F%3F%3F is decoded back to :// (see Request ( Raw) panel)
By default characters encoded characters in URL Path is Decoded back. So for example https%3A%2F%2F will be changed to https:// when URL is sent to API Server. This obviously creates problem because it must remain Encoded inside URL Path (Path is anything before ? in URL).
Add --dont-escape-- suffix in URL
For example change original URL as below to fix the error.
After you change as above and click Test notice how it shows unchanged URL in request (%2F and %3F is not changed)
For more information check this link.
Using JSON Source - Read Google Search Console API Example
Now lets look at
"dimensions" : ["date","country"]