Facebook

Get your Facebook credentials

To use Facebook sign in, you need a client ID and client secret. You can get them from the Facebook Developer Portal.

Make sure to set the redirect URL to http://localhost:3000/api/auth/callback/facebook for local development. For production, you should set it to the URL of your application. 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 import the provider and pass it to the socialProviders option of the auth instance.

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

Signin with Facebook

To signin with Facebook, 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 facebook.

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