oauth_service_token's documentation on scope is unclear

[jarodmeng]

oauth_service_token's documentation on its scope argument is

a character vector of scopes to request.

The function actually only allows a length 1 character vector.

if (!is.null(scope) && !(is.character(scope) && length(scope) == 1))
stop("`scope` must be a length 1 character vector.", call. = FALSE)

I don't know why it only accepts length 1 character vector, but if that's the case, the function documentation should state the requirement explicitly.

Also, it turns out that user can collapse a list of scopes by spaces and supply the collapsed string to scope. This feature is not documented anywhere and is hard to discover.