Cannot access Web API CORE 3.0 from Postman calls - asp.net-web-api

Question

I am testing simple .NET Web API CORE 3.1 and have setup simple methods by following tutorial on https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-web-api?view=aspnetcore-3.1&tabs=visual-studio. I have managed to run Web API but couldn't make calls from Postman/
Controller
namespace CoreAPIApplication.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class TodoItemsController : ControllerBase
{
private readonly TodoContext _context;
public TodoItemsController(TodoContext context)
{
_context = context;
}
[HttpGet]
public async Task<ActionResult<IEnumerable<TodoItem>>> GetTodoItems()
{
return await _context.TodoItems.ToListAsync();
}
[HttpGet("{id}")]
public async Task<ActionResult<TodoItem>> GetTodoItem(long id)
{
var todoItem = await _context.TodoItems.FindAsync(id);
if (todoItem == null)
{
return NotFound();
}
return todoItem;
}
[HttpPut("{id}")]
public async Task<IActionResult> PutTodoItem(long id, TodoItem todoItem)
{
if (id != todoItem.Id)
{
return BadRequest();
}
_context.Entry(todoItem).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!TodoItemExists(id))
{
return NotFound();
}
else
{
throw;
}
}
return NoContent();
}
[HttpPost]
public async Task<ActionResult<TodoItem>> PostTodoItem(TodoItem todoItem)
{
_context.TodoItems.Add(todoItem);
await _context.SaveChangesAsync();
return CreatedAtAction(nameof(GetTodoItem), new { id = todoItem.Id }, todoItem);
}
[HttpDelete("{id}")]
public async Task<ActionResult<TodoItem>> DeleteTodoItem(long id)
{
var todoItem = await _context.TodoItems.FindAsync(id);
if (todoItem == null)
{
return NotFound();
}
_context.TodoItems.Remove(todoItem);
await _context.SaveChangesAsync();
return todoItem;
}
private bool TodoItemExists(long id)
{
return _context.TodoItems.Any(e => e.Id == id);
}
}
}
I have tried postman with and without SSL certificate enable from postman setting but still no result

Answer 1

From Startup.cs comment out
app.UseHttpsRedirection();
and use http://localhost:5000
If you do need to run it on https, you may need to have a certificate.
You can create one by running : "dotnet dev-certs https --trust" in your terminal/cmd.

Answer 2

Can you enable CorsPolicy by adding this => [EnableCors("CorsPolicy")] on the top of your controller class.
namespace CoreAPIApplication.Controllers
{
[EnableCors("CorsPolicy")]
[Route("api/[controller]")]
[ApiController]