```tsx import React, { useState } from "react"; enum LoginPageType { LOGIN = "login", FORGOT_PASSWORD = "forgot_password", REGISTER = "register", } type User = { username: string; password: string; }; function App() { const [currentPage, setCurrentPage] = useState(LoginPageType.LOGIN); const [username, setUsername] = useState(""); const [password, setPassword] = useState(""); const handleLogin = () => { // Here, you would send an API request to verify the user's credentials against the SQL database // Implement your logic here }; const handleForgotPassword = () => { // Here, you would send an API request to reset the user's password based on the provided username/email // Implement your logic here }; const handleRegister = () => { // Here, you would send an API request to create a new user in the SQL database // Implement your logic here }; return (

{currentPage === LoginPageType.LOGIN && (

Login

setUsername(e.target.value)} /> setPassword(e.target.value)} />

Don't have an account?{" "} setCurrentPage(LoginPageType.REGISTER)}> Sign up

setCurrentPage(LoginPageType.FORGOT_PASSWORD)} > Forgot password?

)} {currentPage === LoginPageType.FORGOT_PASSWORD && (

Forgot Password

setUsername(e.target.value)} />

Remembered your password?{" "} setCurrentPage(LoginPageType.LOGIN)}> Login

)} {currentPage === LoginPageType.REGISTER && (

Register

setUsername(e.target.value)} /> setPassword(e.target.value)} />

Already have an account?{" "} setCurrentPage(LoginPageType.LOGIN)}> Login

)}

); } export default function App() { return ; } ``` Please note that this code only implements the UI for the login, forgot password, and registration pages. The actual database verification and interaction is not included as it requires a backend server to handle the API requests.