Fix broken userid

Author: tipsy

src/main/resources/vue/components/_charts.vue

@@ -4,7 +4,7 @@
  if (canvas === null) {
  return;
  }
- let userId = document.body.getAttribute("data-user-id");
+ let userId = data.user.login;
  let labels = Object.keys(data[objectName]);
  let values = Object.values(data[objectName]);
  let colors = createColorArray(labels.length);