Fix issue where member last name became RFID card

When applying the JSON override fields the RFID card info was assigned
to the lastName field. this has been fixed.

src/models/member.rs

@@ -40,7 +40,7 @@ pub struct Member {
     pub balance: i32,
     #[serde(rename = "imagePreference")]
     pub image_preference: String,
-    #[serde(rename = "lastName")]
+    #[serde(rename = "rfidCards")]
     pub rfid_cards: Vec<RfidCard>
 }