Simplified json import

software/backend/data/accounts.json

@@ -8,8 +8,6 @@
       "lastName": "Hagemeister",
       "addresses": [
         {
-          "id": 0,
-          "accountId": 0,
           "street": "Laportestraße",
           "houseNumber": 22,
           "postalCode": 30449,
@@ -18,8 +16,6 @@
       ],
       "payments": [
         {
-          "id": 0,
-          "accountId": 0,
           "bankName": "Deutsche Bank",
           "iban": "DE92500105175721645777"
         }
@@ -34,8 +30,6 @@
       "lastName": "Stoiber",
       "addresses": [
         {
-          "id": 1,
-          "accountId": 1,
           "street": "Gustav-Adolf-Straße",
           "houseNumber": 30,
           "postalCode": 30167,
@@ -44,8 +38,6 @@
       ],
       "payments": [
         {
-          "id": 1,
-          "accountId": 1,
           "bankName": "DZ Bank",
           "iban": "DE12500105179557939114"
         }

software/backend/data/cities-locations.json

@@ -1,5 +1,5 @@
 {
-  "data": [
+  "cities": [
     {
       "name": "Hannover",
       "country": "Germany",

software/backend/data/exercises.json

@@ -1,5 +1,5 @@
 {
-  "data": [
+  "groups": [
     {
       "nameDe": "Den Shop kennenlernen",
       "nameEn": "Getting to know the shop",

software/backend/data/orders.json

@@ -1,13 +1,11 @@
 {
-  "data": [
+  "orders": [
     {
       "username": "hagemeister93",
-      "shippingProgress": 4,
-      "addressId": 0,
-      "paymentId": 0,
       "tickets": [
         {
-          "concertId": 0,
+          "date": "2024-10-18",
+          "concertGroupName": "Unlimited Love",
           "orderPrice": 184,
           "seatGroup": "A",
           "seatRow": 0,
@@ -17,19 +15,18 @@
     },
     {
       "username": "duranduran",
-      "shippingProgress": 5,
-      "addressId": 4,
-      "paymentId": 3,
       "tickets": [
         {
-          "concertId": 0,
+          "date": "2024-10-18",
+          "concertGroupName": "Unlimited Love",
           "orderPrice": 184,
           "seatGroup": "A",
           "seatRow": 0,
           "seat": 2
         },
         {
-          "concertId": 0,
+          "date": "2024-10-18",
+          "concertGroupName": "Unlimited Love",
           "orderPrice": 184,
           "seatGroup": "A",
           "seatRow": 0,
@@ -39,12 +36,10 @@
     },
     {
       "username": "duranduran",
-      "shippingProgress": 2,
-      "addressId": 5,
-      "paymentId": 3,
       "tickets": [
         {
-          "concertId": 0,
+          "date": "2024-10-18",
+          "concertGroupName": "Unlimited Love",
           "orderPrice": 184,
           "seatGroup": "A",
           "seatRow": 0,