Google

Get your Google credentials

To use Google as a social provider, you need to get your Google credentials. You can get them by creating a new project in the Google Cloud Console.

In the Google Cloud Console > Credentials > Authorized redirect URIs, make sure to set the redirect URL to http://localhost:3000/api/auth/callback/google for local development. For production, make sure to set the redirect URL as your application domain, e.g. https://example.com/api/auth/callback/google. If you change the base path of the auth routes, you should update the redirect URL accordingly.

Configure the provider

To configure the provider, you need to pass the clientId and clientSecret to socialProviders.google in your auth configuration.

auth.ts

import { betterAuth } from "better-auth"
 
export const auth = betterAuth({
    socialProviders: {
        google: { 
            clientId: process.env.GOOGLE_CLIENT_ID as string, 
            clientSecret: process.env.GOOGLE_CLIENT_SECRET as string, 
        }, 
    },
})

Usage

To sign in with Google, you can use the signIn.social function provided by the client. The signIn function takes an object with the following properties:

provider: The provider to use. It should be set to google.

auth-client.ts

import { createAuthClient } from "better-auth/client"
const authClient =  createAuthClient()
 
const signIn = async () => {
    const data = await authClient.signIn.social({
        provider: "google"
    })
}

To sign in with Google using the ID Token, you can use the signIn.social function to pass the ID Token.

This is useful when you have the ID Token from Google on the client-side and want to use it to sign in on the server.

If id token is provided no redirection will happen, and the user will be signed in directly.

auth-client.ts

const data = await authClient.signIn.social({
    provider: "google",
    idToken: {
        token: // Google ID Token,
        accessToken: // Google Access Token
    }
})

If you want to use google one tap, you can use the One Tap Plugin guide.

Get your Google credentials

Configure the provider

Usage

Sign In with Google

Sign In with Google With ID Token

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