Build Signup with Password

Before you start

You need:

  • An Auth0 development tenant with Universal Login configured.

  • A custom-domain-configured application.

  • A development app or a sample app (like the React sample app) running on your localhost

  • A database connection that uses passwords.

By the end of this guide, you'll have an identity-first flow with a customized Signup screen. To learn more, read the Getting Started guide and visit the SDK reference guide.

Setup

In your Auth0 Dashboard, set up Universal Login, Identifier First Authentication, and a Database Connection that uses passwords.

Run a single-page application to build custom login screens. To understand the context for Advanced Customizations interfaces, clone our boilerplate app: git clone https://github.com/auth0/auth0-acul-react-boilerplate

Install the ACUL SDK. After cloning the react boilerplate, change the directory to the auth0-acul-react-boilerplate folder and install the SDK.

// open the directory where you git clone the boilerplate
cd auth0-acul-react-boilerplate && npm i
// Install the ACUL JS SDK
npm install @auth0/auth0-acul-js

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1. Build the signup screen

Below is a full sample of the Screen.

/

import { ChangeEvent } from "react";
import { Signup as ScreenProvider } from "@auth0/auth0-acul-js";

// UI Components
import { Label } from "@/components/ui/label";
import { Input } from "@/components/ui/input";
import { Button } from "@/components/ui/button";
import { Text } from "@/components/ui/text";
import { Link } from "@/components/ui/link";
import {
  CardHeader,
  CardTitle,
  CardDescription,
  CardContent,
} from "@/components/ui/card";

export default function Signup() {
  // Initialize the SDK for this screen
  const screenProvider = new ScreenProvider();

  // Handle the submit action
  const formSubmitHandler = (event: ChangeEvent<HTMLFormElement>) => {
    event.preventDefault();

    // grab the value from the form
    const identifierInput = event.target.querySelector(
      "input#identifier"
    ) as HTMLInputElement;
    const passwordInput = event.target.querySelector(
      "input#password"
    ) as HTMLInputElement;

    screenProvider.signup({
      email: identifierInput?.value,
      password: passwordInput?.value,
    });
  };

  // Render the form
  return (
    <form noValidate onSubmit={formSubmitHandler}>
      <CardHeader>
        <CardTitle className="mb-2 text-3xl font-medium text-center">
          {screenProvider.screen.texts?.title ?? "Welcome"}
        </CardTitle>
        <CardDescription className="mb-8 text-center">
          {screenProvider.screen.texts?.description ?? "Create your account"}
        </CardDescription>
      </CardHeader>
      <CardContent>
        <div className="mb-2 space-y-2">
          <Label htmlFor="identifier">
            {screenProvider.screen.texts?.emailPlaceholder ??
              "Enter your email"}
          </Label>
          <Input
            type="text"
            id="identifier"
            name="identifier"
            defaultValue={
              screenProvider.screen.data?.email ??
              screenProvider.untrustedData.submittedFormData?.email
            }
          />
        </div>
        <div className="mb-2 space-y-2">
          <Label htmlFor="password">
            {screenProvider.screen.texts?.passwordPlaceholder ?? "Password"}
          </Label>
          <Input type="password" id="password" name="password" />
        </div>
        <Button type="submit" className="w-full">
          {screenProvider.screen.texts?.buttonText ?? "Continue"}
        </Button>
        <Text>
          {screenProvider.screen.texts?.footerText ??
            "Already have an account?"}
          <Link className="ml-1" href={screenProvider.screen.links?.login ?? "#"}>
            {screenProvider.screen.texts?.footerLinkText ??
              "Log into your account"}
          </Link>
        </Text>
      </CardContent>
    </form>
  );
}

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Import and initialize the SDK

In the auth0-acul-react-boilerplate/src folder, create a folder called screens and a file called Login.tsx. Import the SDK and in the React component initialize the SDK for the screen.

import { Signup as ScreenProvider } from "@auth0/auth0-acul-js";

export default function Signup() {
  // Initialize the SDK for this screen
  const screenProvider = new ScreenProvider();
  ...
 }

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Use the SDK to access properties and methods on the screen

Using the SDK you can access the properties and methods of the screen. The Auth0 ACUL JS SDK provides properties and methods to access the data.

<form noValidate onSubmit={formSubmitHandler}>
      ...
      <CardContent>
        <div className="mb-2 space-y-2">
          <Label htmlFor="identifier">
            {screenProvider.screen.texts?.emailPlaceholder ??
              "Enter your email"}
          </Label>
          <Input
            type="text"
            id="identifier"
            name="identifier"
            defaultValue={
              screenProvider.screen.data?.email ??
              screenProvider.untrustedData.submittedFormData?.email
            }
          />
        </div>
        <div className="mb-2 space-y-2">
          <Label htmlFor="password">
            {screenProvider.screen.texts?.passwordPlaceholder ?? "Password"}
          </Label>
          <Input type="password" id="password" name="password" />
        </div>
        <Button type="submit" className="w-full">
          {screenProvider.screen.texts?.buttonText ?? "Continue"}
        </Button>
      ...
      </CardContent>
    </form>
  );
}

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Call the submit action

Using the SDK, submit the data captured in the screen to the server. The server process this data and will route the user to the next step in the flow. If there are errors, this screen is reloaded, allowing you to display them to the user. Errors are accessed from the SDK.

const formSubmitHandler = (event: ChangeEvent<HTMLFormElement>) => {
    event.preventDefault();

    // grab the value from the form
    const identifierInput = event.target.querySelector(
      "input#identifier"
    ) as HTMLInputElement;
    const passwordInput = event.target.querySelector(
      "input#password"
    ) as HTMLInputElement;

    screenProvider.signup({
      email: identifierInput?.value,
      password: passwordInput?.value,
    });
  };

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2: Configure ACUL to use local assets

Use Auth0 CLI, Terraform, or the Management API to enable ACUL. For details about what can be configured, read Configure ACUL Screens.

In the root directory of your project, create a settings folder and include in it a {SCREENNAME}.json file.

//settings.json
{
  "rendering_mode": "advanced",
  "context_configuration": [
    "screen.texts"
  ],
  "default_head_tags_disabled": false,
  "head_tags": [
    {
      "attributes": {
        "async": true,
        "defer": true,
        "integrity": [
          "ASSET_SHA"
        ],
        "src": "http://127.0.0.1:8080/index.js"
      },
      "tag": "script"
    },
    {
      "attributes": {
        "href": "http://127.0.0.1:8080/index.css",
        "rel": "stylesheet"
      },
      "tag": "link"
    }
  ]
}

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 Enable ACUL with Auth0 CLI:

auth0 ul customize --rendering-mode advanced --prompt {SCREENNAME} --screen {SCREENNAME} --settings-file ./settings/{SCREENNAME}.json

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Build your configuration on a local server

ACUL requires assets to be hosted on a public URL. Run a local server and test your assets before deploying them.

npm run build

cd dist
npx serve -p 8080 // serve the assets on your local machine

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3: Test your configuration on a local server

Advanced Customization for Universal Login works with all modern Javascript bundlers. like Vite and Webpack. For more information, read Deploy Advanced Customizations to Production.

For more information about deploying ACUL to your tenant, read Configure ACUL Screens.

Read... To learn...                                
Advanced Customizations for Universal Login How Advanced Customizations work.
Getting Started with Advanced Customizations Getting Started basics for Advanced Customizations
Advanced Customizations for Universal Login: Screens A list of all screens available for Advanced Customizations.