added properties

Jenkinsfile

@@ -1,10 +1,25 @@
 pipeline {
   agent any
+  properties {
+    string(
+        defaultValue: 'worldwidepaniel',
+        description: 'Kaggle username',
+        name: 'KAGGLE_USERNAME',
+        trim: false
+    ),
+    password(
+        defaultValue: '',
+        description: 'Kaggle token taken from kaggle.json file, as described in https://github.com/Kaggle/kaggle-api#api-credentials',
+        name: 'KAGGLE_KEY'
+    )
+    }
   stages {
-    stage('Checkout') {
+    stage('Download data') {
         steps {
-        checkout scm
-        sh 'ls -las'
+          withEnv(["KAGGLE_USERNAME=${params.KAGGLE_USERNAME}",
+                        "KAGGLE_KEY=${params.KAGGLE_KEY}" ]) {
+                  sh './data_download.sh'
+              }
         }
       }
    }