import UIKit

class ViewController: UIViewController {
    
    let posts = Post()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        posts.fetch(success: {
            response in
            print(response)
        })
    }

}
import UIKit

class ViewController: UIViewController {
    
    let post = Post()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        post.fetch()
    }

}
--- 
+++ 
@@ -2,12 +2,15 @@
 
 class ViewController: UIViewController {
     
-    let post = Post()
+    let posts = Post()
     
     override func viewDidLoad() {
         super.viewDidLoad()
         
-        post.fetch()
+        posts.fetch(success: {
+            response in
+            print(response)
+        })
     }
 
 }
Add success handler in example posts fetch
