error: cannot find 'WebAuthenticationSessionOptions' in scope

[discentem]

error: cannot find 'WebAuthenticationSessionOptions' in scope
    @State private var webAuthenticationSessionOptions =  WebAuthenticationSessionOptions()
                                                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/brandon_kurtz/swiftauthexperiment/Sources/swiftauthexperimenttarg/main.swift:19:35: error: cannot find 'gitHubAuthorizationURLString' in scope
                        TextField(gitHubAuthorizationURLString, text: $webAuthenticationSessionOptions.urlString)
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/brandon_kurtz/swiftauthexperiment/Sources/swiftauthexperimenttarg/main.swift:25:35: error: cannot find 'gitHubAuthorizationURLString' in scope
                        TextField(gitHubAuthorizationURLString, text: $webAuthenticationSessionOptions.callbackURLScheme)
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
[1/2] Compiling swiftauthexperimenttarg main.swift

I'm guessing that my personal Package.swift file is wrong in some way but would appreciate any advice if you can spot the problem:

// swift-tools-version:5.5
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "swiftauthexperiment",
    platforms: [
        .macOS(.v11)
    ],
    dependencies: [
        .package(url: "https://github.com/stleamist/BetterSafariView.git", .upToNextMajor(from: "2.3.1"))
    ],
    targets: [
        .target(name: "swiftauthexperimenttarg", dependencies: ["BetterSafariView"])
    ]
)