chore: nits and small code improvements found during investigation of PR#3168 (#3259)

crates/router/src/connector/utils.rs

@@ -806,7 +806,7 @@ impl CardData for api::Card {
         let year = self.get_card_expiry_year_2_digit()?;
         Ok(Secret::new(format!(
             "{}{}{}",
-            self.card_exp_month.peek().clone(),
+            self.card_exp_month.peek(),
             delimiter,
             year.peek()
         )))
@@ -817,14 +817,14 @@ impl CardData for api::Card {
             "{}{}{}",
             year.peek(),
             delimiter,
-            self.card_exp_month.peek().clone()
+            self.card_exp_month.peek()
         ))
     }
     fn get_expiry_date_as_mmyyyy(&self, delimiter: &str) -> Secret<String> {
         let year = self.get_expiry_year_4_digit();
         Secret::new(format!(
             "{}{}{}",
-            self.card_exp_month.peek().clone(),
+            self.card_exp_month.peek(),
             delimiter,
             year.peek()
         ))
@@ -1211,7 +1211,7 @@ where
 {
     let connector_meta_secret =
         connector_meta.ok_or_else(missing_field_err("connector_meta_data"))?;
-    let json = connector_meta_secret.peek().clone();
+    let json = connector_meta_secret.expose();
     json.parse_value(std::any::type_name::<T>()).switch()
 }
 

crates/router/src/connector/worldline/transformers.rs

@@ -342,7 +342,7 @@ fn make_card_request(
     req: &PaymentsAuthorizeData,
     ccard: &payments::Card,
 ) -> Result<CardPaymentMethod, error_stack::Report<errors::ConnectorError>> {
-    let expiry_year = ccard.card_exp_year.peek().clone();
+    let expiry_year = ccard.card_exp_year.peek();
     let secret_value = format!(
         "{}{}",
         ccard.card_exp_month.peek(),

crates/router/src/core/fraud_check.rs

@@ -2,7 +2,7 @@ use std::fmt::Debug;
 
 use api_models::{admin::FrmConfigs, enums as api_enums, payments::AdditionalPaymentData};
 use error_stack::ResultExt;
-use masking::PeekInterface;
+use masking::{ExposeInterface, PeekInterface};
 use router_env::{
     logger,
     tracing::{self, instrument},
@@ -167,10 +167,9 @@ where
                     match frm_configs_option {
                         Some(frm_configs_value) => {
                             let frm_configs_struct: Vec<FrmConfigs> = frm_configs_value
-                                .iter()
+                                .into_iter()
                                 .map(|config| { config
-                                    .peek()
-                                    .clone()
+                                    .expose()
                                     .parse_value("FrmConfigs")
                                     .change_context(errors::ApiErrorResponse::InvalidDataFormat {
                                         field_name: "frm_configs".to_string(),

crates/router/src/core/payment_methods/vault.rs

@@ -47,7 +47,7 @@ impl Vaultable for api::Card {
             exp_month: self.card_exp_month.peek().clone(),
             name_on_card: self
                 .card_holder_name
-                .clone()
+                .as_ref()
                 .map(|name| name.peek().clone()),
             nickname: None,
             card_last_four: None,