Refresh provider access token using genericOAuth plugin

export const auth = betterAuth({
    session: {
        expiresIn: 15 * 60,
        updateAge: 15 * 60
    },
    database: new Pool({
        connectionString: process.env.DATABASE_URL
    }),
    plugins: [
        customSession(async ({ session, user }) => {
            const supabase = await createClient()
            const { data, error } = await supabase.from('account').select('*').eq('userId', user.id).single()
            if (error) throw new Error(error.message)
            return {
                user,
                session: {
                    ...session,
                    accessToken: data.accessToken
                }
            }
        }),
        genericOAuth({
            config: [
                {
                    clientId: process.env.CLIENT_ID,
                    clientSecret: process.env.CLIENT_SECRET,
                    providerId: 'customOAuth2ProviderId',
                    scopes: ['openid'],
                    authorizationUrl: `${process.env.AUTHORIZATION_URL}`,
                    tokenUrl: `${process.env.TOKEN_URL}`,
                    userInfoUrl: `${process.env.USER_INFO_URL}`

                }
            ]
        })
    ]
})