Null isAuth signals no data fetched.

src/components/AuthUser/AuthContext.tsx

@@ -3,9 +3,9 @@ import { createContext } from 'react';
 
 export type AuthData = {
   role: string;
-  isAuth: boolean;
+  isAuth: boolean | null;
   setRole: (role: string) => void;
-  setIsAuth: (state: boolean) => void;
+  setIsAuth: (state: boolean | null) => void;
 };
 
 export const AuthContext = createContext<AuthData>({