Can now delete user, and also asks user to confirm action

frontend/src/Components/UserInfoModal.tsx

@@ -49,7 +49,13 @@ function UserInfoModal(props: {
           <Button
             text={"Delete"}
             onClick={function (): void {
-              DeleteUser({ usernameToDelete: props.username });
+              if (
+                window.confirm("Are you sure you want to delete this user?")
+              ) {
+                DeleteUser({
+                  usernameToDelete: props.username,
+                });
+              }
             }}
             type="button"
           />