try output stacktrace as well

src/deployment.js

@@ -65,6 +65,7 @@ class Deployment {
         core.info(JSON.stringify(response.data))
         this.deploymentInfo = response.data
       } catch (error) {
+        core.error(error.stack)
 
         // build customized error message based on server response
         if (error.response) {

src/index.js

@@ -43,6 +43,7 @@ async function main() {
     await deployment.create(idToken)
     await deployment.check()
   } catch (error) {
+
     core.setFailed(error)
   }
 }