message: Renaming to params to conform with common pattern
diff: use crate::config::{Client, Response};
  use crate::ids::{CustomerId, PaymentMethodId};
  -use crate::resources::{PaymentMethod};
  +use crate::resources::PaymentMethod;
  use serde_derive::{Deserialize, Serialize};
  -/// Attach a payment method to a customer
  +/// The parameters for `PaymentMethod::attach`
  ///
  /// For more details see [https://stripe.com/docs/api/payment_methods/attach](https://stripe.com/docs/api/payment_methods/attach).
  #[derive(Clone, Debug, Deserialize, Serialize)]
  @@ -18,8 +18,8 @@ impl PaymentMethod {
  pub fn attach(
  client: &Client,
  payment_method_id: &PaymentMethodId,
  - attach: AttachPaymentMethod,
  + params: AttachPaymentMethod,
  ) -> Response<PaymentMethod> {
  - client.post_form(&format!("/payment_methods/{}/attach", payment_method_id), attach)
  + client.post_form(&format!("/payment_methods/{}/attach", payment_method_id), params)
  }
  }
  