in apex web service I receive continuous error
Challenge not yet complete in trailhead playground 5
Executing the 'AccountManager' method failed. Either the service isn't configured with the correct urlMapping, is not global, does not have the proper method name or does not return the requested account and all of its contacts.
  
my code is--
@RestResource(urlMapping='/Accounts/*/contacts')
global with sharing class AccountManager {
    @HttpGet
    global static Account getAccount() {
        RestRequest req = RestContext.request;
        String accId = req.requestURI.substringBetween('Accounts/', '/contacts');
        system.debug(accId);
        Account acc = [SELECT Id, Name, (SELECT Id, Name FROM Contacts)  FROM Account WHERE Id = :accId];
        return acc;
    }
}

test class---
@IsTest
private class AccountManagerTest {
    @isTest static void testGetContactByaccountId() {
        Id recordId = createTestRecord();
        // Set up a test request
        RestRequest request = new RestRequest();
        request.requestUri =
            'https://empathetic-panda-ususw6-dev-ed.lightning.force.com/services/apexrest/Accounts/' + recordId + '/contacts';
           
        request.httpMethod = 'GET';
        RestContext.request = request;
        // Call the method to test
        Account thisAccount = AccountManager.getAccount();
        // Verify results
        System.assert(thisAccount != null);
        System.assertEquals('Test record', thisAccount.Name);
    
    }  
    // Helper method
    static Id createTestRecord() {
        // Create test record
        Account accountTest = new Account(
           Name ='Test record');
        insert accountTest;
        Contact contactTest =new contact(
        FirstName='bada',
        LastName='Boom',
        AccountId=accountTest.id);
        insert contactTest;
        return accountTest.Id;
    }          
}
please can any one pss me the challenge ..
thank you