RefitExample.cs

var cachedToken = string.Empty;

var identityApi = RestService.For<IIdentityApi>("https://localhost:5001");
var tweetbookApi = RestService.For<ITweetbookApi>("https://localhost:5001", new RefitSettings
{
    AuthorizationHeaderValueGetter = () => Task.FromResult(cachedToken)
});

var registerResponse = await identityApi.RegisterAsync(new UserRegistrationRequest
{
    Email = "[email protected]",
    Password = "Test1234!"
});

var loginResponse = await identityApi.LoginAsync(new UserLoginRequest
{
    Email = "[email protected]",
    Password = "Test1234!"
});

cachedToken = loginResponse.Content.Token;

var allPosts = await tweetbookApi.GetAllAsync();