add kagle CLI

Jenkinsfile

@@ -1,6 +1,31 @@
 pipeline {
    agent any
    stages {
+    stage('Preparation') {
+        properties([
+            parameters([
+                string(
+                    defaultValue: 'tomaszzitkiewicz',
+                    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'
+                )
+            ])
+        ])
+    }
+    stage('Build') {
+        // Run the maven build
+        withEnv(["KAGGLE_USERNAME=${params.KAGGLE_USERNAME}",
+                 "KAGGLE_KEY=${params.KAGGLE_KEY}" ]) {
+            sh 'echo KAGGLE_USERNAME: $KAGGLE_USERNAME'
+            sh 'kaggle datasets list'
+        }
+    }
       stage('checkout: Check out from version control') {
          steps {
             git 'https://git.wmi.amu.edu.pl/s440058/ium_440058.git'