App Móvil con React Native + AWS Cognito

// amplify-config.ts
import { Amplify } from "aws-amplify";

Amplify.configure({
  Auth: {
    Cognito: {
      userPoolId: process.env.EXPO_PUBLIC_USER_POOL_ID!,
      userPoolClientId: process.env.EXPO_PUBLIC_CLIENT_ID!,
      identityPoolId: process.env.EXPO_PUBLIC_IDENTITY_POOL_ID!,
      loginWith: {
        email: true,
      },
      mfa: {
        status: "optional",
        totpEnabled: true,
      },
      passwordFormat: {
        minLength: 8,
        requireLowercase: true,
        requireUppercase: true,
        requireNumbers: true,
        requireSpecialCharacters: true,
      },
    },
  },
});

// hooks/useAuth.ts
import { useState, useEffect } from "react";
import {
  signIn,
  signUp,
  signOut,
  getCurrentUser,
  fetchAuthSession,
  AuthUser,
} from "aws-amplify/auth";

export function useAuth() {
  const [user, setUser] = useState<AuthUser | null>(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    getCurrentUser()
      .then(setUser)
      .catch(() => setUser(null))
      .finally(() => setLoading(false));
  }, []);

  const login = async (email: string, password: string) => {
    const result = await signIn({ username: email, password });
    if (result.isSignedIn) {
      setUser(await getCurrentUser());
    }
    return result;
  };

  const logout = async () => {
    await signOut();
    setUser(null);
  };

  const getToken = async (): Promise<string> => {
    const session = await fetchAuthSession();
    return session.tokens?.idToken?.toString() ?? "";
  };

  return { user, loading, login, logout, getToken };
}