message: Fix failed doc test
diff: @@ -178,6 +178,12 @@ mod macros {
  /// for (Token)[crate::oauth2::Token]
  /// Example
  /// ```
  + /// use rspotify::oauth2::TokenBuilder;
  + /// use rspotify::scope;
  + /// use std::collections::HashSet;
  + /// use chrono::prelude::*;
  + /// use chrono::Duration;
  + ///
  /// let scope: HashSet<String> = scope!("playlist-read-private", "playlist-read-collaborative");
  /// let tok = TokenBuilder::default()
  /// .access_token("test-access_token")
  