added credential setting

src/main/java/de/uulm/omi/ds/coding/App.java

@@ -12,7 +12,12 @@ public class App {
 
     public static void main( String[] args ){
 
-        Client client = ColosseumClientHelper.getColosseumClient();
+
+        final String user = "TODO";
+        final String password = "TODO";
+
+
+        Client client = ColosseumClientHelper.getColosseumClient(user, password);
 
         /**
          * retrieving a list of Image objects from the remote service Colosseum

src/main/java/de/uulm/omi/ds/coding/utils/ColosseumClientHelper.java

@@ -8,13 +8,13 @@ import de.uniulm.omi.cloudiator.colosseum.client.ClientBuilder;
  */
 public class ColosseumClientHelper {
 
-  public static Client getColosseumClient(){
+  public static Client getColosseumClient(String user, String password){
 
 
     String colosseumUri = "http://134.60.152.90:9000/api";
 
     ClientBuilder clientBuilder = ClientBuilder.getNew().url(colosseumUri)
-        .credentials("john.doe@example.com", "admin", "admin");
+        .credentials(user, password, "admin");
 
     Client colosseumClient = clientBuilder.build();