Untitled

  User u = new User();
            u.firstName = firstName;
            u.lastName = lastName;
            u.Username = email;
            u.Email = email;
            u.CommunityNickname = CommunityNickNameUser; 
                 

            String accountId;

            // create Account
            AccountName = firstName + ' ' + lastName + '_Account';
            
            Account portalAccount = new Account();
            portalAccount.Name = AccountName;
            portalAccount.Phone = PhoneNumber;
            insert portalAccount;

            portalAccount.IsPartner = true;
            update portalAccount;

            //assign buyers

            setUpAccountAsBuyer(portalAccount);

            accountId = portalAccount.Id;
            
            // create user 
          
            //predefined function
            string userId = 'Abc';
            system.debug(userId);
           
            if (userId != null) {

                if (password != null && password.length() > 8) {
                   // List<String> listOfPermissions = new List<String>{
                   //     'B2B_Commerce_Bike_Buyer'
                   // };
                    string userId2 = Site.createPortalUser(u, accountId, password);
                     system.debug(userId2);
                    list<String> listOfPermissions = new list<string>();
                    listOfPermissions.add('B2B_Commerce_Bike_Buyer');
                    //listOfPermissions.add('B2B_LE_Video_Player_Reader');
                     //we take this from available permission set to assign user from background.
                    CommunityUserPermissionSet(userId2, listOfPermissions);
                    ApexPages.PageReference pageRef = Site.login(username, password, null );
                    if(pageRef != null) {
                        resp.put('url',pageRef.getUrl());
                        return resp;
                    }
                        
                }
            }
            string Check =  portalAccount.id + ' ' + userId;
            return resp;
        }
    } catch (Exception e) {
        system.debug('e.getMessage+   '+e.getMessage());
        if(!Test.isRunningTest()) throw new AuraHandledException(e.getMessage());
        return null;
        
    }

}