Additional fields missing from User type

export const auth = betterAuth({
    appName: 'Test',
    user: {
        additionalFields: {
            timezone: {
                type: 'string',
                default: 'UTC',
                nullable: false,
            },
            customerId: {
                type: 'string',
                default: '',
                nullable: false,
            },
        },
    },