[PM-5216] User and Organization Duo Request and Response Model refactor (#4126)

* inital changes

* add provider GatewayType migrations

* db provider migrations

* removed duo migrations added v2 metadata to duo response

* removed helper scripts

* remove signature from org duo

* added backward compatibility for Duo v2

* added tests for duo request + response models

* refactors to TwoFactorController

* updated test methods to be compartmentalized by usage

* fix organization add duo

* Assert.Empty() fix for validator

test/Api.Test/Auth/Models/Response/UserTwoFactorDuoResponseModelTests.cs

@@ -0,0 +1,107 @@
+
+using Bit.Api.Auth.Models.Response.TwoFactor;
+using Bit.Core.Entities;
+using Bit.Test.Common.AutoFixture.Attributes;
+using Xunit;
+
+namespace Bit.Api.Test.Auth.Models.Response;
+
+public class UserTwoFactorDuoResponseModelTests
+{
+    [Theory]
+    [BitAutoData]
+    public void User_WithDuoV4_ShouldBuildModel(User user)
+    {
+        // Arrange
+        user.TwoFactorProviders = GetTwoFactorDuoV4ProvidersJson();
+
+        // Act
+        var model = new TwoFactorDuoResponseModel(user);
+
+        // Assert if v4 data Ikey and Skey are set to clientId and clientSecret
+        Assert.NotNull(model);
+        Assert.Equal("clientId", model.ClientId);
+        Assert.Equal("clientSecret", model.ClientSecret);
+        Assert.Equal("clientId", model.IntegrationKey);
+        Assert.Equal("clientSecret", model.SecretKey);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public void User_WithDuov2_ShouldBuildModel(User user)
+    {
+        // Arrange
+        user.TwoFactorProviders = GetTwoFactorDuoV2ProvidersJson();
+
+        // Act
+        var model = new TwoFactorDuoResponseModel(user);
+
+        // Assert if only v2 data clientId and clientSecret are set to Ikey and Skey
+        Assert.NotNull(model);
+        Assert.Equal("IKey", model.ClientId);
+        Assert.Equal("SKey", model.ClientSecret);
+        Assert.Equal("IKey", model.IntegrationKey);
+        Assert.Equal("SKey", model.SecretKey);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public void User_WithDuo_ShouldBuildModel(User user)
+    {
+        // Arrange
+        user.TwoFactorProviders = GetTwoFactorDuoProvidersJson();
+
+        // Act
+        var model = new TwoFactorDuoResponseModel(user);
+
+        // Assert Even if both versions are present priority is given to v4 data
+        Assert.NotNull(model);
+        Assert.Equal("clientId", model.ClientId);
+        Assert.Equal("clientSecret", model.ClientSecret);
+        Assert.Equal("clientId", model.IntegrationKey);
+        Assert.Equal("clientSecret", model.SecretKey);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public void User_WithDuoEmpty_ShouldFail(User user)
+    {
+        // Arrange
+        user.TwoFactorProviders = "{\"2\" : {}}";
+
+        // Act
+        var model = new TwoFactorDuoResponseModel(user);
+
+        /// Assert
+        Assert.False(model.Enabled);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public void User_WithTwoFactorProvidersNull_ShouldFail(User user)
+    {
+        // Arrange
+        user.TwoFactorProviders = null;
+
+        // Act
+        var model = new TwoFactorDuoResponseModel(user);
+
+        /// Assert
+        Assert.False(model.Enabled);
+    }
+
+    private string GetTwoFactorDuoProvidersJson()
+    {
+        return "{\"2\":{\"Enabled\":true,\"MetaData\":{\"SKey\":\"SKey\",\"IKey\":\"IKey\",\"ClientSecret\":\"clientSecret\",\"ClientId\":\"clientId\",\"Host\":\"example.com\"}}}";
+    }
+
+    private string GetTwoFactorDuoV4ProvidersJson()
+    {
+        return "{\"2\":{\"Enabled\":true,\"MetaData\":{\"ClientSecret\":\"clientSecret\",\"ClientId\":\"clientId\",\"Host\":\"example.com\"}}}";
+    }
+
+    private string GetTwoFactorDuoV2ProvidersJson()
+    {
+        return "{\"2\":{\"Enabled\":true,\"MetaData\":{\"SKey\":\"SKey\",\"IKey\":\"IKey\",\"Host\":\"example.com\"}}}";
+    }
+}