Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/helpers/userApi.ts

@@ -0,0 +1,36 @@
+import { UserUtils } from "@dndbeyond/authentication-lib-js";
+
+import { getDecodedStt } from "./tokenUtils";
+
+export const getUserToken = async () => {
+  const stt = await getDecodedStt();
+  return stt;
+};
+
+export const getUser = async () => {
+  const token = await getUserToken();
+  return {
+    ...UserUtils.jwtToUser(token),
+    displayName: token.displayName,
+  };
+};
+
+export const getUserDisplayName = async () => {
+  const user = await getUser();
+  return user.displayName;
+};
+
+export const getUserId = async () => {
+  const user = await getUser();
+  return user.id;
+};
+
+export const getSubscriptionTier = async () => {
+  const user = await getUser();
+  return user.subscriptionTier;
+};
+
+export const getRoles = async () => {
+  const user = await getUser();
+  return user.roles;
+};