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How to define Polly policies when working with Refit library in ASP.NET Core?

Note: this is based on my question on SO and subsequent activity [there](https://stackoverflow.com/q/74055782/2780791)

I am trying to add resilience using [Polly ](https://github.com/App-vNext/Polly)to HTTP calls that are performed using [Refit library](https://github.com/reactiveui/refit).

I am using the Refit factory method `RestService.For<>` and I have a working code, but I feel it is way more complex than it should be:

### The refit interface

```c#
[Headers("Authorization: Bearer")]
public interface IBarIntegration
{
	[Get("/api/ext/Foo/GetFooBriefInfo")]
	Task<ApiResponse<GetFooBriefInfoForFooDto>> GetFooBriefInfo(GetFooBriefInfoForFooInputDto inputData);
}
```

### Factory class that also configures the authentication

```c#
internal sealed class BarApiClientHelper : IBarApiClientHelper
{
	private readonly IOptionsSnapshot<BarApiSettings> _BarSettings;
	private readonly IAccessTokenHelperService _accessTokenHelperService;

	public BarApiClientHelper(IOptionsSnapshot<BarApiSettings> BarSettings, IAccessTokenHelperService accessTokenHelperService)
	{
		_BarSettings = BarSettings;
		_accessTokenHelperService = accessTokenHelperService;
	}

	public async Task<TApiClient> CreateApiClient<TApiClient>(CancellationToken token)
	{
		string baseUrl = _BarSettings.Value.BaseUrl;
		string accessToken = await _accessTokenHelperService.GetAccessToken(token);

		var refitClient = RestService.For<TApiClient>(baseUrl, new RefitSettings
		{
			AuthorizationHeaderValueGetter = () => Task.FromResult(accessToken)
		});

		return refitClient;
	}
}
```

### Example call

```c#
public async Task<GetFooBriefInfoForFooDto> GetFooBriefInfo(string upn, CancellationToken token)
{
	var apiClient = await _clientHelper.CreateApiClient<IBarIntegration>(token);
	var retrialPolicy = _registry.Get<AsyncRetryPolicy<IApiResponse>>(DefaultRetrialPolicy);

	var func = async () => (IApiResponse) await apiClient.GetFooBriefInfo(new GetFooBriefInfoForFooInputDto { FooContactUpn = upn });
	var FooInfo = (ApiResponse<GetFooBriefInfoForFooDto>) await retrialPolicy.ExecuteAsync(func);
	await FooInfo.EnsureSuccessStatusCodeAsync();

	return FooInfo.Content!;
}
```