fix: adding appVersion field to auth model

mdx-models/src/main/java/com/mx/path/model/mdx/model/id/v20240213/Authentication.java

@@ -15,6 +15,7 @@ public enum DeviceRegistration {
     SECONDARY
   }
 
+  private String appVersion;
   private List<Challenge> challenges;
   private String clientDeviceToken;
   private Integer deviceHeight;
@@ -56,4 +57,22 @@ public final Authentication withUserId(String newUserId) {
     this.setUserId(newUserId);
     return this;
   }
+
+  /**
+   * Returns the version of the application.
+   *
+   * @return the application version as a {@link String}, or {@code null} if not set
+   */
+  public String getAppVersion() {
+    return appVersion;
+  }
+
+  /**
+   * Sets the version of the application.
+   *
+   * @param appVersion the application version to set
+   */
+  public void setAppVersion(String appVersion) {
+    this.appVersion = appVersion;
+  }
 }