Init

src/lib/auth-client.ts

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+import { createAuthClient } from "better-auth/react"
+
+export const authClient = createAuthClient({
+  baseURL: process.env.NEXT_PUBLIC_APP_URL || "http://localhost:3000",
+})
+
+export const {
+  signIn,
+  signOut,
+  signUp,
+  useSession,
+  getSession,
+} = authClient

src/lib/auth.ts

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+import { betterAuth } from "better-auth"
+import { drizzleAdapter } from "better-auth/adapters/drizzle"
+import { db } from "./db"
+
+export const auth = betterAuth({
+  database: drizzleAdapter(db, {
+    provider: "pg",
+  }),
+  socialProviders: {
+    google: {
+      clientId: process.env.GOOGLE_CLIENT_ID as string,
+      clientSecret: process.env.GOOGLE_CLIENT_SECRET as string,
+    },
+  },
+})

src/lib/db.ts

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+import { drizzle } from "drizzle-orm/postgres-js"
+import postgres from "postgres"
+import * as schema from "./schema"
+
+const connectionString = process.env.DATABASE_URL as string
+
+if (!connectionString) {
+  throw new Error("DATABASE_URL environment variable is not set")
+}
+
+const client = postgres(connectionString)
+export const db = drizzle(client, { schema })

src/lib/schema.ts

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+import { pgTable, text, timestamp, boolean, primaryKey } from "drizzle-orm/pg-core"
+
+export const user = pgTable("user", {
+  id: text("id").primaryKey(),
+  name: text("name"),
+  email: text("email").unique(),
+  emailVerified: boolean("emailVerified"),
+  image: text("image"),
+  createdAt: timestamp("createdAt").defaultNow(),
+  updatedAt: timestamp("updatedAt").defaultNow(),
+})
+
+export const session = pgTable("session", {
+  id: text("id").primaryKey(),
+  expiresAt: timestamp("expiresAt"),
+  token: text("token").unique(),
+  createdAt: timestamp("createdAt").defaultNow(),
+  updatedAt: timestamp("updatedAt").defaultNow(),
+  ipAddress: text("ipAddress"),
+  userAgent: text("userAgent"),
+  userId: text("userId").references(() => user.id, { onDelete: "cascade" }),
+})
+
+export const account = pgTable("account", {
+  id: text("id").primaryKey(),
+  accountId: text("accountId"),
+  providerId: text("providerId"),
+  userId: text("userId").references(() => user.id, { onDelete: "cascade" }),
+  accessToken: text("accessToken"),
+  refreshToken: text("refreshToken"),
+  idToken: text("idToken"),
+  accessTokenExpiresAt: timestamp("accessTokenExpiresAt"),
+  refreshTokenExpiresAt: timestamp("refreshTokenExpiresAt"),
+  scope: text("scope"),
+  password: text("password"),
+  createdAt: timestamp("createdAt").defaultNow(),
+  updatedAt: timestamp("updatedAt").defaultNow(),
+})
+
+export const verification = pgTable("verification", {
+  id: text("id").primaryKey(),
+  identifier: text("identifier"),
+  value: text("value"),
+  expiresAt: timestamp("expiresAt"),
+  createdAt: timestamp("createdAt").defaultNow(),
+  updatedAt: timestamp("updatedAt").defaultNow(),
+})

src/lib/utils.ts

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+import { clsx, type ClassValue } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}