Challenge Not yet complete... here's what's wrong: 
The runWarehouseEquipmentSync method does not appear to have run successfully. Could not find a successfully completed @future job for this method. Make sure that you run this method at least one before attempting this challenge. Since this method is annotated with the @future method, you may want to wait for a few seconds to ensure that it has processed successfully.

here is my code

public with sharing class WarehouseCalloutService {
    
    private static final String WAREHOUSE_URL = 'https://th-superbadge-apex.herokuapp.com/equipment';
    @future(callout=true)
    // complete this method to make the callout (using @future) to the
    // REST endpoint and update equipment on hand.
    public static void runWarehouseEquipmentSync(){
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        request.setEndpoint(WAREHOUSE_URL);
        request.setMethod('GET');
        HttpResponse response = http.send(request);
        // If the request is successful, parse the JSON response.
        String ret = '';
        if (response.getStatusCode() == 200) {
            // Deserialize the JSON string into collections of primitive data types.
            List<Object> results = (List<Object>) JSON.deserializeUntyped(response.getBody());
            
            List<Product2> LstProduct = new List<Product2>();
            for(Object obj : results)
            { 
                Map<String, Object> mapobj = (Map<String, Object>)obj;
                Product2 product = new Product2();
                           
                Integer maintenanceperiod = (Integer)mapobj.get('maintenanceperiod');               
                Integer Lifespan = (Integer)mapobj.get('lifespan');
                Integer Cost = (Integer)mapobj.get('cost');
                Boolean replacement = (Boolean)mapobj.get('replacement');
                Integer quantity = ((Integer)mapobj.get('qIntegerntity'));
                product.Name  = (String)mapobj.get('name'); 
                product.Maintenance_Cycle__c = Integer.valueof(maintenanceperiod);
                product.Cost__c = Cost;
                product.Current_Inventory__c = quantity;
                product.Lifespan_Months__c = Lifespan; 
                product.Replacement_Part__c = replacement;
                product.Warehouse_SKU__c = (String) mapobj.get('sku');
                product.ProductCode = (String)mapobj.get('_id');       
                LstProduct.add(product);
            }
            
            System.debug(LstProduct);
             upsert LstProduct Warehouse_SKU__c;
        
        }
        
       
    }
}

Automate record creation
Install the unmanaged package for the schema and stubs for Apex classes and triggers. Rename cases and products to match the HowWeRoll schema, and assign all profiles to the custom HowWeRoll page layouts for those objects. Use the included package content to automatically create a Routine Maintenance request every time a maintenance request of type Repair or Routine Maintenance is updated to Closed. Follow the specifications and naming conventions outlined in the business requirements.
how to achieved ?