data model is nearly complete

UserService.Test/UnitTest1.cs

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+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using NUnit.Framework;
+using UserService.DataModels;
+
+namespace UserService.Test
+{
+    public class Tests
+    {
+        [SetUp]
+        public void Setup()
+        {
+        }
+
+        [Test]
+        public async Task Test1()
+        {
+            using var db = new GroupsContext();
+            var user = await db.Users.FirstOrDefaultAsync();
+            var secGroup = await db.SecurityGroups.FirstOrDefaultAsync();
+            var ous = await db.OrganizationUnits.ToListAsync();
+            var mo = await db.UserMembers.ToListAsync();
+
+            //var testGroup = new SecurityGroup {CommonName = "Test", Parent = ous.Last()};
+            //await db.SecurityGroups.AddAsync(testGroup);
+            //var testgroup = await db.SecurityGroups.FindAsync(1);
+            //testgroup.Members.Add(new UserMember{MemberId = testgroup.Id, UserId = user.Id});
+            //await db.SaveChangesAsync();
+            Assert.Pass();
+        }
+    }
+}

UserService.Test/UserService.Test.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="nunit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\UserService\UserService.csproj" />
+  </ItemGroup>
+
+</Project>