can you create a UML diagram from the following javascript code: import React, $\{$ useState $\}$ from 'react';

import $\{$ View, TextInput, TouchableOpacity, Text, StyleSheet,Alert$\}$ from 'react$-$native';

import $\{$ useNavigation $\}$ from $\text{'}$@react$-$navigation$/$native$\text{'}$;

import $\{$ createUserWithEmailAndPassword $\}$ from 'firebase$/$auth$\text{'}$;

import $\{$auth$\}$ from $\text{'}../$firebaseConfig$\text{'}$;

$//$import $\{$ createUserWithEmailAndPassword $\}$ from 'firebase$/$auth$\text{'}$;

const SignUp $=()=>\{$

const $[$username$,$ setUsername$]=$ useState$(\text{'}\text{'})$;

const $[$password$,$ setPassword$]=$ useState$(\text{'}\text{'})$;

const $[$email$,$ setEmail$]=$ useState$(\text{'}\text{'})$;

const navigation $=$ useNavigation$()$;

const handleSignUp $=$ async $()=>\{$

if$(!$email $|!$password$)\{$

Alert.alert$(\text{'}$Error$\text{'},$'Please fill in all fields'$)$;

return;

$\}$

setLoading

try$\{$

const response $=$ await createUserWithEmailAndPassword$($auth$,$email,password$)$;

console.log$($response$)$;

$\}$

catch$($error$)\{$

console.log$($error$)$;

alert$(\text{'}$Sign In has failed:$\text{'}+$ error.message$)$;

$\}$

$\}$;

const handleLogin$=()=>\{$

navigation.navigate$(\text{'}$Login$\text{'})$;

$\}$

const buttonOpacity $=$ password && email $?1$ : $0\mathrm{.}5$;

return $($

Enter your email

setEmail$($text$)\}$

value$=\{$email$\}$

style$=\{$styles$.$input$\}$

keyboardType$=$"email$-$address"

$/>$

Create a Password

setPassword$($text$)\}$

value$=\{$password$\}$

secureTextEntry$=\{$true$\}$

style$=\{$styles$.$input$\}$

$/>$

Sign Up

Already have an account? Login

$)$;

$\}$;

const styles $=$ StyleSheet.create$(\{$

container: $\{$

flex: $1,$

justifyContent: 'center',

alignItems: 'center',

padding: $20,$

$\},$

input: $\{$

width: $\text{'}100\%\text{'},$

borderWidth: $1,$

borderColor: $\text{'}$#ccc$\text{'},$

padding: $10,$

marginBottom: $10,$

$\},$

button: $\{$

backgroundColor: $\text{'}$#$007$bff$\text{'},$

paddingVertical: $10,$

paddingHorizontal: $20,$

borderRadius: $5,$

$\},$

buttonText: $\{$

color: $\text{'}$#fff$\text{'},$

fontSize: $16,$

textAlign: 'center',

$\},$

$\})$;

export default SignUp;