Add Identity.isAnonymous for future use

Author: CarsonF

src/core/authentication/identity.service.ts

@@ -26,6 +26,16 @@ export class Identity {
     return this.sessionHost.currentIfInCtx;
   }
 
+  /**
+   * Is the current requestor anonymous (not logged in)?
+   *
+   * Not the best API, use is discouraged.
+   * Prefer using Auth Policies / {@link Privileges}`.for.can()`
+   */
+  get isAnonymous() {
+    return this.current.anonymous;
+  }
+
   /**
    * Is the current user an admin?
    *