fix auth unit tests

Author: roninopf

tests/unit-tests/AuthTests.swift

@@ -643,6 +643,10 @@ class AuthTests: XCTestCase {
                     completion(AuthTests.authToken)
                 }
             }
+            
+            func onTokenRegistrationFailed() {
+                
+            }
         }
 
         let authDelegate = AsyncAuthDelegate()
@@ -671,6 +675,10 @@ class AuthTests: XCTestCase {
             func onAuthTokenRequested(completion: @escaping AuthTokenRetrievalHandler) {
                 completion(AuthTests.authToken)
             }
+            
+            func onTokenRegistrationFailed() {
+                
+            }
         }
 
         let authDelegate = AuthDelegate()
@@ -718,6 +726,10 @@ class AuthTests: XCTestCase {
                     completion(AuthTests.authToken)
                 }
             }
+            
+            func onTokenRegistrationFailed() {
+                
+            }
         }
 
         let authDelegate = AsyncAuthDelegate()
@@ -852,6 +864,10 @@ class AuthTests: XCTestCase {
         func onAuthTokenRequested(completion: @escaping AuthTokenRetrievalHandler) {
             completion(authTokenGenerator())
         }
+        
+        func onTokenRegistrationFailed() {
+            
+        }
     }
 
     private func createAuthDelegate(_ authTokenGenerator: @escaping () -> String?) -> IterableAuthDelegate {