Duplicate Email Issue Google Auth

export const auth = betterAuth({
    database: mongodbAdapter(db),
    emailAndPassword: {  
        enabled: true
    },
    socialProviders: {
        google: { 
            clientId: process.env.GOOGLE_CLIENT_ID as string, 
            clientSecret: process.env.GOOGLE_CLIENT_SECRET as string
        }, 
    },
    session: {
        // Set session to expire after 30 days
        maxAge: 30 * 24 * 60 * 60,
        // Update session on each request
        updateAge: 24 * 60 * 60
    },
    // Ensure we're using the correct database name
    modelName: "user",
    // Enable account linking for social providers
    account: {
        accountLinking: {
            enabled: true,
            // Allow linking accounts with different emails if needed
            allowDifferentEmails: false,
            // Update user info when linking accounts
            updateUserInfoOnLink: true
        }
    }
})