Email + password login scheme set up, mailgun sending set up.

server/src/auth/auth.ts

@@ -1,4 +1,5 @@
 import { betterAuth } from 'better-auth';
+import { hash as argon2Hash, verify as argon2Verify } from '@node-rs/argon2';
 import { kyselyAdapter } from '@better-auth/kysely-adapter';
 import { Kysely, PostgresDialect } from 'kysely';
 import { Pool } from 'pg';
@@ -29,6 +30,10 @@ export const auth = betterAuth({
   emailAndPassword: {
     enabled: true,
     requireEmailVerification: true,
+    password: {
+      hash: (password) => argon2Hash(password, { memoryCost: 65536, timeCost: 3, parallelism: 4, algorithm: 2 }),
+      verify: ({ hash, password }) => argon2Verify(hash, password),
+    },
     sendResetPassword: async ({ user, url }) => {
       await sendEmail({
         to: user.email,