C# API: test token for management API returns AggregateException

This is giving me an error (forgive my F#):

#r "nuget: FSharpPlus"
#r "nuget: Auth0.Core"
#r "nuget: Auth0.ManagementApi"

open FSharpPlus
open System.Threading.Tasks
open Auth0
open Auth0.ManagementApi
open Auth0.ManagementApi.Models

let token = "..."

let client = Auth0.ManagementApi.ManagementApiClient(token, "https://redacted.ca.auth0.com/")

let req = GetUsersRequest()

let result = client.Users.GetAllAsync(req).Result

System.AggregateException: One or more errors occurred. (The format of value 'Bearer
’ is invalid.)

The token is valid JWT tested on JWT.io generated from the Auth0 Management API page. It also works in the docs.

Any idea what’s going on here?

Thanks in advance!