some changes

barkmanAPI/Program.cs

@@ -1,5 +1,5 @@
+using Microsoft.EntityFrameworkCore;
 using Microsoft.OpenApi.Models;
-using BarkMan.DB;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -23,10 +23,20 @@ if (app.Environment.IsDevelopment())
 
 app.MapGet("/", () => "Hello World!");
 
-app.MapGet("/inventory/{id}", (int id) => InventoryDb.GetInventory(id));
-app.MapGet("/inventory", () => InventoryDb.GetInventory());
-app.MapPost("/inventory", (InventoryItem item) => InventoryDb.CreateInventoryItem(item));
-app.MapPut("/inventory", (InventoryItem item) => InventoryDb.UpdateItem(item));
-app.MapDelete("/inventory/{id}", (int id) => InventoryDb.RemoveItem(id));
+app.MapGet("/inventory", async (InventoryContext dbContext) =>
+{
+    var inventoryItems = await dbContext.Set<InventoryContext>().ToListAsync();
+    return Results.Ok(inventoryItems);
+});
+
+app.MapPost("/inventory", async (InventoryContext dbContext, InventoryContext newItem) =>
+{
+    dbContext.Add(newItem);
+    await dbContext.SaveChangesAsync();
+    return Results.Created($"/inventory/{newItem.Id}", newItem);
+});
+//app.MapGet("/inventory/{id}", (int id) => InventoryDb.GetInventory(id));
+//app.MapPut("/inventory", (InventoryItem item) => InventoryDb.UpdateItem(item));
+//app.MapDelete("/inventory/{id}", (int id) => InventoryDb.RemoveItem(id));
 
 app.Run();

barkmanAPI/barkmanAPI.csproj

@@ -9,6 +9,10 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.0" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.0">
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+          <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
         <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.0" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="6.1.4" />
     </ItemGroup>