diff --git a/restservice/src/main/java/com/plannaplan/controllers/TokenController.java b/restservice/src/main/java/com/plannaplan/controllers/TokenController.java
new file mode 100644
index 0000000..d23b931
--- /dev/null
+++ b/restservice/src/main/java/com/plannaplan/controllers/TokenController.java
@@ -0,0 +1,21 @@
+package com.plannaplan.controllers;
+
+import com.plannaplan.security.CasValidator;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@CrossOrigin
+public class TokenController {
+
+    public static String SERVICE_URL = "http://localhost:3000";
+
+    // @GetMapping("/token")
+    // public ResponseEntity<String> getToken(@RequestParam("ticket") final String ticket) {
+    //     CasValidator validator = new CasValidator(SERVICE_URL,ticket);
+    // }
+}
diff --git a/restservice/src/main/java/com/plannaplan/security/CasValidationExcepiton.java b/restservice/src/main/java/com/plannaplan/security/CasValidationExcepiton.java
new file mode 100644
index 0000000..88f3f5b
--- /dev/null
+++ b/restservice/src/main/java/com/plannaplan/security/CasValidationExcepiton.java
@@ -0,0 +1,13 @@
+package com.plannaplan.security;
+
+public class CasValidationExcepiton extends RuntimeException {
+    /**
+     *
+     */
+    private static final long serialVersionUID = 1L;
+
+    public CasValidationExcepiton(String s) {
+        super(s);
+    }
+
+}
diff --git a/restservice/src/main/java/com/plannaplan/security/CasValidator.java b/restservice/src/main/java/com/plannaplan/security/CasValidator.java
index 4af59b2..9813758 100644
--- a/restservice/src/main/java/com/plannaplan/security/CasValidator.java
+++ b/restservice/src/main/java/com/plannaplan/security/CasValidator.java
@@ -20,7 +20,7 @@ public class CasValidator {
         this.ticket = ticket;
     }
 
-    public String validate() throws Exception {
+    public String validate() throws Exception, CasValidationExcepiton{
         HttpGet request = new HttpGet(CasValidator.CAS_URL + "/validate?service="
                 + URLEncoder.encode(this.service, "UTF-8") + "&ticket=" + URLEncoder.encode(this.ticket, "UTF-8"));
         try (CloseableHttpResponse response = httpClient.execute(request)) {
@@ -31,8 +31,11 @@ public class CasValidator {
             if (entity != null) {
                 // return it as a String
                 result = EntityUtils.toString(entity);
-
+                if(result.replace("\n", "").trim().equals("no")){
+                    throw new CasValidationExcepiton("Validation failed");
+                }
             }
+
             String res = result.substring(result.indexOf('\n') + 1);
             return res;
 
diff --git a/restservice/src/test/java/com/plannaplan/security/CasValidatorTest.java b/restservice/src/test/java/com/plannaplan/security/CasValidatorTest.java
index 234a759..f825874 100644
--- a/restservice/src/test/java/com/plannaplan/security/CasValidatorTest.java
+++ b/restservice/src/test/java/com/plannaplan/security/CasValidatorTest.java
@@ -1,5 +1,7 @@
 package com.plannaplan.security;
 
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -14,8 +16,25 @@ public class CasValidatorTest {
         try {
             System.out.println(validator.validate());
         } catch (Exception e) {
-            // TODO Auto-generated catch block
             e.printStackTrace();
+            assertTrue(false);
+        }
+    }
+
+    @Test
+    public void shouldNotValidateTicket() {
+        //you need to privide fresh ticket to make this test pass that's why it is marked as ignored
+        CasValidator validator = new CasValidator("http://localhost:3000",
+                "notticket");
+        try {
+            assertTrue(validator.validate().trim().equals(""));
+        } 
+        catch (CasValidationExcepiton e){
+            assertTrue(true);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+            assertTrue(false);
         }
     }
 }