message: change add_owners to return a string and transmit the status message passed from the owner_add function in crates.io
diff: @@ -116,6 +116,7 @@ pub struct Warnings {
  }
  #[derive(Deserialize)] struct R { ok: bool }
  +#[derive(Deserialize)] struct OwnerResponse { ok: String }
  #[derive(Deserialize)] struct ApiErrorList { errors: Vec<ApiError> }
  #[derive(Deserialize)] struct ApiError { detail: String }
  #[derive(Serialize)] struct OwnersReq<'a> { users: &'a [&'a str] }
  @@ -141,16 +142,14 @@ impl Registry {
  let body = serde_json::to_string(&OwnersReq { users: owners })?;
  let body = self.put(format!("/crates/{}/owners", krate),
  body.as_bytes())?;
  - //assert!(serde_json::from_str::<R>(&body)?.ok);
  - //Ok(())
  - Ok(body)
  + Ok(serde_json::from_str::<OwnerResponse>(&body)?.ok)
  }
  pub fn remove_owners(&mut self, krate: &str, owners: &[&str]) -> Result<()> {
  let body = serde_json::to_string(&OwnersReq { users: owners })?;
  let body = self.delete(format!("/crates/{}/owners", krate),
  Some(body.as_bytes()))?;
  - assert!(serde_json::from_str::<R>(&body)?.ok);
  + serde_json::from_str::<OwnerResponse>(&body)?;
  Ok(())
  }
  