feat(payment_methods_v2): single use token implementation (#7485)

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crates/api_models/src/payment_methods.rs

@@ -455,6 +455,15 @@ impl PaymentMethodCreate {
             _ => false,
         }
     }
+    pub fn get_tokenize_connector_id(
+        &self,
+    ) -> Result<id_type::MerchantConnectorAccountId, error_stack::Report<errors::ValidationError>>
+    {
+        self.psp_tokenization
+            .clone()
+            .get_required_value("psp_tokenization")
+            .map(|psp| psp.connector_id)
+    }
 }
 
 #[cfg(all(