commented the code and refactored to new shared.

Signed-off-by: Matt Bruce <mbrucedogs@gmail.com>

EmployeeDirectory/ViewModels/EmployeesViewModel.swift

@@ -7,18 +7,17 @@
 
 import Foundation
 
+/// ViewModel that will be bound to an Employees model and used
+/// specifically with the EmployeesViewController.
 @MainActor
 public class EmployeesViewModel: ObservableObject {
-    private let service: EmployeeService
     private var serviceMode: EmployeeServiceMode = .production
 
     @Published public private(set) var employees: [Employee] = []
     @Published public private(set) var errorMessage: String? = nil
     @Published public private(set) var isLoading: Bool = false
     
-    public init(service: EmployeeService = EmployeeService()) {
-        self.service = service
-    }
+    public init() {}
     
     public func fetchEmployees() {
         // resetting values out the values before fetching new data
@@ -28,17 +27,17 @@ public class EmployeesViewModel: ObservableObject {
         Task {
             do {
                 // Fetch employees using the async method
-                let wrapper = try await service.getEmployees(serviceMode)
+                let wrapper = try await EmployeeService.shared.getEmployees(serviceMode)
                 
                 // Update published properties
-                self.employees = wrapper.employees
-                self.isLoading = false
+                employees = wrapper.employees
+                isLoading = false
 
             } catch {
                 // Handle errors
-                self.employees = []
-                self.isLoading = false
-                self.errorMessage = "An unexpected error occurred, please try to refresh"
+                employees = []
+                isLoading = false
+                errorMessage = "An unexpected error occurred, please try to refresh"
             }
         }