Add authorization to header and access [Authorize] controllers - asp.net-core

Question

I use Jwt token to login with .NET Core API version 3.1.
I saw token generated but it couldn't access [Authorize] controllers, always returns 401. I've found the way to add authorization to the headers. However, there's no detailed instructions to set up and how to use it to access [Authorize] controllers.
Could anyone tell me how to pass header values by using HttpClient and is there any set up else in Startup.cs? Thank you so much for helping me!

Answer 1

Make sure you are adding JWT authentication to your DI pipeline in Startup.cs like this:
public void ConfigureServices(IServiceCollection services)
{
⋮
services.AddAuthentication("Bearer")
.AddJwtBearer("Bearer", options =>
{
options.Audience = "http://localhost:5001/";
options.Authority = "http://localhost:5000/";
});
⋮
}
Authorize with a specific scheme in ASP.NET Core
Overview of ASP.NET Core authentication
Also, make sure you are using the Authorization middleware in Startup.cs like this:
public void Configure(IApplicationBuilder app)
{
⋮
app.UseAuthentication();
app.UseAuthorization();
⋮
}
UPDATE:
Here is how you can setup the HttpClient:
var client = new HttpClient();
string token; // your token
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
ASP.NET Core Middleware