sarlink-portal/lib/auth.ts

import { sendOtp } from "@/actions/auth-actions";
import { PrismaClient } from "@prisma/client";
import { betterAuth } from "better-auth";
import { prismaAdapter } from "better-auth/adapters/prisma";
import { phoneNumber } from "better-auth/plugins";

const prisma = new PrismaClient();
export const auth = betterAuth({
	database: prismaAdapter(prisma, {
		provider: "sqlite", // or "mysql", "postgresql", ...etc
	}),
	plugins: [
		phoneNumber({
			sendOTP: async ({ phoneNumber, code }) => {
				// Implement sending OTP code via SMS
				console.log("Send OTP in auth.ts", phoneNumber, code);
				await sendOtp(phoneNumber, code);
			},
			signUpOnVerification: {
				getTempEmail: (phoneNumber) => {
					return `${phoneNumber}@my-site.com`;
				},
				//optionally you can alos pass `getTempName` function to generate a temporary name for the user
				getTempName: (phoneNumber) => {
					return phoneNumber; //by default it will use the phone number as the name
				},
			},
		}),
	],
});