chore: v2 api changes for session token endpoint (#6032)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/router/src/core/payments.rs

@@ -145,7 +145,7 @@ where
         .validate_request(&req, &merchant_account)?;
 
     tracing::Span::current().record("payment_id", format!("{}", validate_result.payment_id));
-
+    // get profile from headers
     let operations::GetTrackerResponse {
         operation,
         customer_details,
@@ -171,6 +171,7 @@ where
 
     let (operation, customer) = operation
         .to_domain()?
+        // get_customer_details
         .get_or_create_customer_details(
             state,
             &mut payment_data,

crates/router/src/routes/app.rs

@@ -517,10 +517,15 @@ pub struct Payments;
 impl Payments {
     pub fn server(state: AppState) -> Scope {
         let mut route = web::scope("/v2/payments").app_data(web::Data::new(state));
-        route = route.service(
-            web::resource("/{payment_id}/saved_payment_methods")
-                .route(web::get().to(list_customer_payment_method_for_payment)),
-        );
+        route = route
+            .service(
+                web::resource("/{payment_id}/saved_payment_methods")
+                    .route(web::get().to(list_customer_payment_method_for_payment)),
+            )
+            .service(
+                web::resource("/{payment_id}/create_external_sdk_tokens")
+                    .route(web::post().to(payments_connector_session)),
+            );
 
         route
     }

crates/router/src/routes/payments.rs

@@ -529,6 +529,16 @@ pub async fn payments_dynamic_tax_calculation(
     .await
 }
 
+#[cfg(feature = "v2")]
+#[instrument(skip_all, fields(flow = ?Flow::PaymentsSessionToken, payment_id))]
+pub async fn payments_connector_session(
+    state: web::Data<app::AppState>,
+    req: actix_web::HttpRequest,
+    json_payload: web::Json<payment_types::PaymentsSessionRequest>,
+) -> impl Responder {
+    "Session Response"
+}
+
 #[cfg(feature = "v1")]
 #[instrument(skip_all, fields(flow = ?Flow::PaymentsSessionToken, payment_id))]
 pub async fn payments_connector_session(

crates/router/src/services/api.rs

@@ -1237,6 +1237,7 @@ impl Authenticate for api_models::payment_methods::PaymentMethodListRequest {
     }
 }
 
+#[cfg(feature = "v1")]
 impl Authenticate for api_models::payments::PaymentsSessionRequest {
     fn get_client_secret(&self) -> Option<&String> {
         Some(&self.client_secret)