diff --git a/k6/foundations/09.data.js b/k6/foundations/09.data.js
index 1e907fd1..4ffa6616 100644
--- a/k6/foundations/09.data.js
+++ b/k6/foundations/09.data.js
@@ -36,8 +36,8 @@ export const options = {
 const pizzas = new Counter('quickpizza_number_of_pizzas');
 const ingredients = new Trend('quickpizza_ingredients');
 
-const customers = new SharedArray('all my customers', function () {
-  return JSON.parse(open('./data/customers.json')).customers;
+const tokens = new SharedArray('all tokens', function () {
+  return JSON.parse(open('./data/tokens.json')).tokens;
 });
 
 export function setup() {
@@ -59,7 +59,7 @@ export function getPizza() {
   let res = http.post(`${BASE_URL}/api/pizza`, JSON.stringify(restrictions), {
     headers: {
       'Content-Type': 'application/json',
-      'Authorization': 'token abcdef0123456789',
+      'Authorization': 'Token ' + tokens[Math.floor(Math.random() * tokens.length)],
     },
   });
   check(res, { "status is 200": (res) => res.status === 200 });
diff --git a/k6/foundations/11.composability.js b/k6/foundations/11.composability.js
index bad6199f..62f108f1 100644
--- a/k6/foundations/11.composability.js
+++ b/k6/foundations/11.composability.js
@@ -48,8 +48,8 @@ export const options = {
 const pizzas = new Counter("quickpizza_number_of_pizzas");
 const ingredients = new Trend("quickpizza_ingredients");
 
-const customers = new SharedArray("all my customers", function () {
-  return JSON.parse(open("./data/customers.json")).customers;
+const tokens = new SharedArray("all tokens", function () {
+  return JSON.parse(open("./data/tokens.json")).tokens;
 });
 
 export function setup() {
@@ -73,7 +73,7 @@ export function getPizza() {
   let res = http.post(`${BASE_URL}/api/pizza`, JSON.stringify(restrictions), {
     headers: {
       "Content-Type": "application/json",
-      'Authorization': 'token abcdef0123456789',
+      "Authorization": "Token " + tokens[Math.floor(Math.random() * tokens.length)],
     },
   });
   check(res, { "status is 200": (res) => res.status === 200 });
diff --git a/k6/foundations/12.modularization.js b/k6/foundations/12.modularization.js
index 38fb8716..f5da8923 100644
--- a/k6/foundations/12.modularization.js
+++ b/k6/foundations/12.modularization.js
@@ -45,8 +45,8 @@ export const options = {
 const pizzas = new Counter('quickpizza_number_of_pizzas');
 const ingredients = new Trend('quickpizza_ingredients');
 
-const customers = new SharedArray('all my customers', function () {
-  return JSON.parse(open('./data/customers.json')).customers;
+const tokens = new SharedArray('all tokens', function () {
+  return JSON.parse(open('./data/tokens.json')).tokens;
 });
 
 export function setup() {
@@ -68,7 +68,7 @@ export function getPizza() {
   let res = http.post(`${BASE_URL}/api/pizza`, JSON.stringify(restrictions), {
     headers: {
       'Content-Type': 'application/json',
-      'Authorization': 'token abcdef0123456789',
+      'Authorization': 'Token ' + tokens[Math.floor(Math.random() * tokens.length)],
     },
   });
   check(res, { "status is 200": (res) => res.status === 200 });
diff --git a/k6/foundations/data/customers.json b/k6/foundations/data/customers.json
deleted file mode 100644
index 929abe1a..00000000
--- a/k6/foundations/data/customers.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "customers": [
-    12351,
-    12352,
-    12353,
-    12354,
-    12355,
-    12356
-  ]
-}
\ No newline at end of file
diff --git a/k6/foundations/data/tokens.json b/k6/foundations/data/tokens.json
new file mode 100644
index 00000000..d7f3363e
--- /dev/null
+++ b/k6/foundations/data/tokens.json
@@ -0,0 +1,10 @@
+{
+    "tokens": [
+        "QivfLrMEt7thtJLQ",
+        "LJwhcDFp0TgvpOtg",
+        "WA1UafNBZrfQMpTf",
+        "NS9RTUgm42fgxe1E",
+        "O62N74Bbt3lNwY6l",
+        "pW6DNdnWppqMl1c6"
+    ]
+}