diff --git a/README.md b/README.md
index 0cfd262f8463e453de00469d5a49082f035429f5..213d962fb6f2663f0e3a90ab6da640da55cda984 100644
--- a/README.md
+++ b/README.md
@@ -455,6 +455,22 @@ class App extends Component {
             .catch(error => {
               //Error while deleting instance id
             });
+
+        // Use this functions instead of FCM.getFCMToken if you want revokes access of token
+        FCM.getEntityFCMToken()
+            .then(token => {
+              // Returns a token that authorizes an FCM Entity by Instance ID
+              // Store fcm token in your server
+            })
+        FCM.deleteEntityFCMToken()
+            .then( () => {
+              // Deleted token successfully
+              // Revokes access to a scope (action) for an entity previously authorized by getToken() with Instance ID
+              // This will reset token
+            })
+            .catch(error => {
+              // Error while deleting token
+            });
     }
 }
 ```
diff --git a/ios/RNFIRMessaging.m b/ios/RNFIRMessaging.m
index bdb05987101093128b12f0286d532405c829c595..629589b442a9a5a7969d4f4a0db79e33be26807d 100644
--- a/ios/RNFIRMessaging.m
+++ b/ios/RNFIRMessaging.m
@@ -408,6 +408,7 @@ RCT_EXPORT_METHOD(getEntityFCMToken:(RCTPromiseResolveBlock)resolve rejecter:(RC
 
     if (deviceToken == nil) {
         resolve(nil);
+        return;
     }
 
     [[FIRInstanceID instanceID]tokenWithAuthorizedEntity:entity scope:kFIRInstanceIDScopeFirebaseMessaging options:@{@"apns_token": deviceToken} handler:^(NSString * _Nullable token, NSError * _Nullable error) {