create sig in flow LO

src/store/account.ts

@@ -2,6 +2,8 @@ import { LS_TOKENS } from "@/lib/constants";
 import { makeAutoObservable } from "mobx";
 
 export class AccountStore {
+	userId?: string;
+
 	isMainMenuOpen: boolean;
 	isSandboxOpen: boolean;
 
@@ -12,6 +14,9 @@ export class AccountStore {
 		this.isMainMenuOpen = savedState ? savedState === "true" : false;
 
 		this.isSandboxOpen = false;
+
+		const savedUserId = localStorage.getItem(LS_TOKENS.userId);
+		this.userId = savedUserId ? savedUserId : undefined;
 	}
 
 	setIsMainMenuOpen(value: boolean) {
@@ -22,4 +27,9 @@ export class AccountStore {
 	setIsSandboxOpen(value: boolean) {
 		this.isSandboxOpen = value;
 	}
+
+	setUserId(value: string) {
+		this.userId = value;
+		localStorage.setItem(LS_TOKENS.userId, value);
+	}
 }