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Version: 0.15.0

Overview

Social login options (e.g., Log in with Google) are a great (maybe even the best) solution for handling user accounts. A famous old developer joke tells us "The best auth system is the one you never have to make."

Wasp wants to make adding social login options to your app as painless as possible.

Using different social providers gives users a chance to sign into your app via their existing accounts on other platforms (Google, GitHub, etc.).

This page goes through the common behaviors between all supported social login providers and shows you how to customize them. It also gives an overview of Wasp's UI helpers - the quickest possible way to get started with social auth.

Available Providers​

Wasp currently supports the following social login providers:

User Entity​

Wasp requires you to declare a userEntity for all auth methods (social or otherwise). This field tells Wasp which Entity represents the user.

Here's what the full setup looks like:

main.wasp
app myApp {
  wasp: {
    version: "^0.15.0"
  },
  title: "My App",
  auth: {
    userEntity: User,
    methods: {
      google: {}
    },
    onAuthFailedRedirectTo: "/login"
  },
}
schema.prisma
model User {
  id Int @id @default(autoincrement())
}

Default Behavior​

When a user signs in for the first time, Wasp creates a new user account and links it to the chosen auth provider account for future logins.

Overrides​

By default, Wasp doesn't store any information it receives from the social login provider. It only stores the user's ID specific to the provider.

If you wish to store more information about the user, you can override the default behavior. You can do this by defining the userSignupFields and configFn fields in main.wasp for each provider.

You can create custom signup setups, such as allowing users to define a custom username after they sign up with a social provider.

Example: Allowing User to Set Their Username​

If you want to modify the signup flow (e.g., let users choose their own usernames), you will need to go through three steps:

  1. The first step is adding a isSignupComplete property to your User Entity. This field will signal whether the user has completed the signup process.
  2. The second step is overriding the default signup behavior.
  3. The third step is implementing the rest of your signup flow and redirecting users where appropriate.

Let's go through both steps in more detail.

1. Adding the isSignupComplete Field to the User Entity​

schema.prisma
model User {
  id               Int     @id @default(autoincrement())
  username         String? @unique
  isSignupComplete Boolean @default(false)
}

2. Overriding the Default Behavior​

Declare an import under app.auth.methods.google.userSignupFields (the example assumes you're using Google):

main.wasp
app myApp {
  wasp: {
    version: "^0.15.0"
  },
  title: "My App",
  auth: {
    userEntity: User,
    methods: {
      google: {
        userSignupFields: import { userSignupFields } from "@src/auth/google.js"
      }
    },
    onAuthFailedRedirectTo: "/login"
  },
}

// ...

And implement the imported function.

src/auth/google.js
export const userSignupFields = {
  isSignupComplete: () => false,
}

3. Showing the Correct State on the Client​

You can query the user's isSignupComplete flag on the client with the useAuth() hook. Depending on the flag's value, you can redirect users to the appropriate signup step.

For example:

  1. When the user lands on the homepage, check the value of user.isSignupComplete.
  2. If it's false, it means the user has started the signup process but hasn't yet chosen their username. Therefore, you can redirect them to EditUserDetailsPage where they can edit the username property.
src/HomePage.jsx
import { useAuth } from 'wasp/client/auth'
import { Navigate } from 'react-router-dom'

export function HomePage() {
  const { data: user } = useAuth()

  if (user.isSignupComplete === false) {
    return <Navigate to="/edit-user-details" />
  }

  // ...
}

Using the User's Provider Account Details​

Account details are provider-specific. Each provider has their own rules for defining the userSignupFields and configFn fields:

UI Helpers​

Use Auth UI

Auth UI is a common name for all high-level auth forms that come with Wasp.

These include fully functional auto-generated login and signup forms with working social login buttons. If you're looking for the fastest way to get your auth up and running, that's where you should look.

The UI helpers described below are lower-level and are useful for creating your custom forms.

Wasp provides sign-in buttons and URLs for each of the supported social login providers.

src/LoginPage.jsx
import {
  GoogleSignInButton,
  googleSignInUrl,
  GitHubSignInButton,
  gitHubSignInUrl,
} from 'wasp/client/auth'

export const LoginPage = () => {
  return (
    <>
      <GoogleSignInButton />
      <GitHubSignInButton />
      {/* or */}
      <a href={googleSignInUrl}>Sign in with Google</a>
      <a href={gitHubSignInUrl}>Sign in with GitHub</a>
    </>
  )
}

If you need even more customization, you can create your custom components using signInUrls.

API Reference​

Fields in the app.auth Dictionary and Overrides​

For more information on:

  • Allowed fields in app.auth
  • userSignupFields and configFn functions

Check the provider-specific API References: