Unable to configure API endpoint using command line tool

[1ec5]

The command line tool reads the access token from the MAPBOX_ACCESS_TOKEN environment variable, but an access token is only valid for a particular API endpoint. The tool should also read the API endpoint from the environment, defaulting to api.mapbox.com.

This code needs to pass the API endpoint into the Credentials(accessToken:host:) initializer:

mapbox-directions-swift/Sources/MapboxDirectionsCLI/CodingOperation.swift

Lines 8 to 12 in 5af9106

	let accessToken: String? =
	ProcessInfo.processInfo.environment["MAPBOX_ACCESS_TOKEN"] ??
	UserDefaults.standard.string(forKey: "MBXAccessToken")
	let credentials = Credentials(accessToken: accessToken!)
	private let directions = Directions(credentials: credentials)

While we’re at it, the MAPBOX_ACCESS_TOKEN environment variable isn’t documented in --help.

/cc @mapbox/navigation-ios @purew