public static Task<NbUser> GetUserAsync(
	string userId,
	NbService service = null
)

Public Shared Function GetUserAsync ( 
	userId As String,
	Optional service As NbService = Nothing
) As Task(Of NbUser)

public:
static Task<NbUser^>^ GetUserAsync(
	String^ userId, 
	NbService^ service = nullptr
)

static member GetUserAsync : 
        userId : string * 
        ?service : NbService 
(* Defaults:
        let _service = defaultArg service null
*)
-> Task<NbUser>