Code refactoring + tests

MainProject.Tests/Services/UserService_Tests.cs

@@ -46,7 +46,7 @@ public class UserService_Tests
     }
 
     [TestMethod]
-    public async Task GetUsers()
+    public async Task GetUserByUsernameAndPassword_Null()
     {
         try
         {
@@ -69,6 +69,33 @@ public class UserService_Tests
         }
     }
 
+    // TODO
+    // [TestMethod]
+    public async Task GetUserByUsernameAndPassword_Success()
+    {
+        try
+        {
+            var userService = TestUtils.CreateUserService();
+            var testUsername = "test@email.it";
+            var testPassword = "password";
+            if(userService != null)
+            {
+                var user = await userService.GetUserByUsernameAndPassword(testUsername, testPassword);
+                Assert.IsTrue(user != null);
+                Assert.IsTrue(user.Username == testUsername);
+            }
+            else
+            {
+                Assert.Fail($"UserService is null");
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine(ex.InnerException);
+            Assert.Fail($"An exception was thrown: {ex.Message}");
+        }
+    }
+
 
 }