Why should you care?

Every e-commerce API starts with customers before cart and checkout.

See it live — copy this example

Create a Web API (dotnet new webapi), paste the example, run dotnet run, test in Swagger.

[HttpPost("register")]
public Task<ActionResult<CustomerDto>> Register(RegisterCustomerDto dto, CancellationToken ct);

[HttpGet("me")]
[Authorize]
public Task<CustomerDto> GetProfile(CancellationToken ct);

Run Example »

This lesson uses terminal or setup steps. Run commands on your computer — the live editor appears on coding lessons.

What happened?

• Follow the practice steps below on ShopNest.API — typing code yourself is the fastest way to learn.

Try it yourself

1. Create Customers table and entity.
2. Add register and GET /me endpoints.
3. Hash passwords — never store plain text.
4. Change a route URL or DTO property and save — test again in Swagger or curl.
5. Return the wrong status code on purpose (404 instead of 200) and see what the client shows.

Remember