Add recoil state

ui/src/state/auth.ts

@@ -0,0 +1,12 @@
+import { User } from '@/api/auth.types';
+import { atom } from 'recoil';
+
+export const userState = atom({
+  key: 'userState',
+  default: undefined as User | undefined
+});
+
+export const isAuthenticatedState = atom({
+  key: 'isAuthenticatedState',
+  default: false
+});