`Challenge` vs `ChallengeResult`

[qui8t]

My apologies in advance if this is explained before, but I could not find any topic on this Github repo, SO, or learn.microsoft.com that explains it.

I am wondering what are the differences between the following two calls when authenticating with an external identity provider, and when each is recommended over the other?

[HttpPost]
[AllowAnonymous]
public IActionResult ExternalLogin()
{
    return Challenge(_getProps(), GoogleDefaults.AuthenticationScheme);
}

[HttpPost]
[AllowAnonymous]
public IActionResult ExternalLogin()
{
    return new ChallengeResult(GoogleDefaults.AuthenticationScheme, _getProps());
}

[Tratcher]

Challenge is just shorthand for ChallengeResult:

aspnetcore/src/Mvc/Mvc.Core/src/ControllerBase.cs

Lines 2327 to 2331 in a527ac5

	[NonAction]
	public virtual ChallengeResult Challenge(
	AuthenticationProperties properties,
	params string[] authenticationSchemes)
	=> new ChallengeResult(authenticationSchemes, properties);

[qui8t]

That makes sense, thank you!!