fix: stackit CLI setup

action.yml

@@ -101,8 +101,16 @@ runs:
           exit 1
         fi
 
+        echo "::group::Authenticating with service account and triggering operation"
+
+        STACKIT_ACCESS_TOKEN="$(stackit auth activate-service-account --only-print-access-token)"
+        export STACKIT_ACCESS_TOKEN
+
+        stackit config set --project-id "$INPUT_PROJECT_ID"
         stackit curl --fail -X POST "https://ske.api.stackit.cloud/v2/projects/$INPUT_PROJECT_ID/regions/$INPUT_REGION/clusters/$INPUT_CLUSTER_NAME/$ENDPOINT"
 
+        echo "::endgroup::"
+
         if [ "$WAIT" != "true" ]; then
           echo "Operation triggered. No wait requested, exiting."
           exit 0