Fix: use approved placeholder in tests

Generated username and API-key fallback in tests; remove deepcode ignore comments.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Author: reeshika-h

src/test/java/com/contentstack/cms/TestClient.java

@@ -1,5 +1,6 @@
 package com.contentstack.cms;
 
+import java.util.UUID;
 import com.contentstack.cms.core.Util;
 import com.contentstack.cms.stack.Stack;
 import io.github.cdimascio.dotenv.Dotenv;
@@ -17,8 +18,8 @@ public class TestClient {
     public final static String USER_ID = (env.get("userId") != null) ? env.get("userId") : "c11e668e0295477f";
     public final static String OWNERSHIP = (env.get("ownershipToken") != null) ? env.get("ownershipToken")
             : "ownershipTokenId";
-    // file deepcode ignore NonCryptoHardcodedSecret/test: <please specify a reason of ignoring this>
-    public final static String API_KEY = (env.get("apiKey") != null) ? env.get("apiKey") : "apiKey99999999";
+    public final static String API_KEY = (env.get("apiKey") != null) ? env.get("apiKey")
+            : "blt" + UUID.randomUUID().toString().replace("-", "").substring(0, 16);
     public final static String MANAGEMENT_TOKEN = (env.get("managementToken") != null) ? env.get("managementToken")
             : "managementToken99999999";
 

src/test/java/com/contentstack/cms/models/LoginDetailTest.java

@@ -1,5 +1,6 @@
 package com.contentstack.cms.models;
 
+import java.util.UUID;
 import com.contentstack.cms.core.AuthInterceptor;
 import okhttp3.Interceptor;
 import okhttp3.internal.http.RealInterceptorChain;
@@ -102,9 +103,9 @@ void getterSetterUserModelLastName() {
     @Test
     void getterSetterUserModelUsername() {
         UserModel userModel = new UserModel();
-        // deepcode ignore NoHardcodedCredentials/test: <please specify a reason of ignoring this>
-        userModel.setUsername("***REMOVED***");
-        Assertions.assertEquals("***REMOVED***",
+        String username = UUID.randomUUID().toString();
+        userModel.setUsername(username);
+        Assertions.assertEquals(username,
                 userModel.getUsername());
     }