reorganization of database layer

UserService.DatabaseLayer/DataModels/UserServiceDbContext.cs

@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace UserService.DatabaseLayer.DataModels
+{
+    public class UserServiceDbContext : DbContext
+    {
+        public DbSet<User> Users { get; set; } = null!;
+        public DbSet<SecurityGroup> SecurityGroups { get; set; } = null!;
+        public DbSet<UserMember> UserMembers { get; set; } = null!;
+        public DbSet<OrganizationUnit> OrganizationUnits { get; set; } = null!;
+
+        protected override void OnConfiguring(DbContextOptionsBuilder options)
+            => options.UseSqlite(@"Data Source=C:\Users\holger\Desktop\UserService\UserService.db");
+
+        /// <inheritdoc />
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            modelBuilder.CreateRelations();
+            modelBuilder.Seed();
+        }
+    }
+}