Grabbed dndbeyond's source code

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

ddb_main/contexts/Authentication/Authentication.tsx

@@ -0,0 +1,21 @@
+import { useContext } from "react";
+import { createContext } from "react";
+
+import useUser from "~/hooks/useUser";
+import type { AppUserState } from "~/hooks/useUser";
+
+export let AuthContext = createContext<AppUserState>(undefined);
+
+export const AuthProvider = ({ children }: { children: React.ReactNode }) => {
+  const user = useUser();
+
+  if (user === undefined) {
+    return null;
+  }
+
+  return <AuthContext.Provider value={user}>{children}</AuthContext.Provider>;
+};
+
+export const useAuth = () => {
+  return useContext(AuthContext);
+};