[AFP-111] ✨ Add 'tokenStorage' util for storing access token in localStorage (@asegers)

src/utils/tokenStorage.ts

+const LOCAL_STORAGE_KEY = "TOKEN";
+
+export const set = (token: string) => { localStorage.setItem(LOCAL_STORAGE_KEY, token); }
+
+export const get = (): string => localStorage.getItem(LOCAL_STORAGE_KEY) || "";
+
+export default { set, get }
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