Prevent the key user being used in rest queries (#12072)

* Add warning about unusable user binding

* linting

* remove unnecessary safe nav operators

* change regex to capture property access of user binding

packages/builder/src/components/integration/RestQueryViewer.svelte

@@ -196,8 +196,36 @@
     }
   }
 
+  const validateQuery = async () => {
+    const forbiddenBindings = /{{\s?user(\.(\w|\$)*\s?|\s?)}}/g
+    const bindingError = new Error(
+      "'user' is a protected binding and cannot be used"
+    )
+
+    if (forbiddenBindings.test(url)) {
+      throw bindingError
+    }
+
+    if (forbiddenBindings.test(query.fields.requestBody ?? "")) {
+      throw bindingError
+    }
+
+    Object.values(requestBindings).forEach(bindingValue => {
+      if (forbiddenBindings.test(bindingValue)) {
+        throw bindingError
+      }
+    })
+
+    Object.values(query.fields.headers).forEach(headerValue => {
+      if (forbiddenBindings.test(headerValue)) {
+        throw bindingError
+      }
+    })
+  }
+
   async function runQuery() {
     try {
+      await validateQuery()
       response = await queries.preview(buildQuery())
       if (response.rows.length === 0) {
         notifications.info("Request did not return any data")