[BUG] Cannot access internal class AuthenticatedHttpClientHandler

[wojciechrak]

Describe the bug
When trying to use authentication handler, AuthenticatedHttpClientHandler like in the readme (ln 570), I get error

'AuthenticatedHttpClientHandler' is inaccessible due to its protection level

Steps To Reproduce (from readme.md)

class LoginViewModel
{
    public async Task LoginAndCallApi()
    {
        var api = RestService.For<IMyRestService>(new HttpClient(new AuthenticatedHttpClientHandler(GetToken)) { BaseAddress = new Uri("https://the.end.point/") });
        var location = await api.GetLocationOfRebelBase();
    }
}

interface IMyRestService
{
    [Get("/getPublicInfo")]
    Task<Foobar> SomePublicMethod();

    [Get("/secretStuff")]
    [Headers("Authorization: Bearer")]
    Task<Location> GetLocationOfRebelBase();
}

Expected behavior
AuthenticatedHttpClientHandler class is public

Version
5.2.1

[clairernovotny]

Looks like the docs are out of date with respect to those types -- the functionality is there but you set the authentication delegate on RefitSettings, either AuthorizationHeaderValueWithParamGetter or AuthorizationHeaderValueGetter depending on your needs. The handlers are added in the pipeline when those are set.

Happy to take a PR that updates the docs :)

[summersk]

Could be helpful to draw attention the need for the Authorization header to already be present on the HttpRequestMessage (I think?). Appears that without, any configured settings delegates are not invoked (AuthenticatedHttpClientHandler.cs:23)

Will draft something else up if I get a spare moment - just wanted to drop this in for consideration because that won't be today!