Merge branch 'gruppPP' into BumBranch

frontend/src/Pages/AdminPages/AdminChangeUsername.tsx

@@ -1,3 +1,4 @@
+import BackButton from "../../Components/BackButton";
 import BasicWindow from "../../Components/BasicWindow";
 import Button from "../../Components/Button";
 
@@ -13,13 +14,7 @@ function AdminChangeUsername(): JSX.Element {
         }}
         type="button"
       />
-      <Button
-        text="Back"
-        onClick={(): void => {
-          return;
-        }}
-        type="button"
-      />
+      <BackButton />
     </>
   );