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This guide will help you get started with Nile Auth and NextJS. This guide outlines the steps required to configure and integrate authentication in your application. This guide assumes that you have already created a NextJS application, if you haven’t, you can use the Quickstart to get started.
If you have not done so yet, be sure you have obtained credentials from the console.
1

Install packages

  npm install @niledatabase/server @niledatabase/nextjs @niledatabase/react @niledatabase/client
2

Configure routes

Configure the splat route. Be sure to add the nextJs extension, it will handle passing the client requests (next/headers), as well passing the correct headers on server-side calls automatically.
app/api/[...nile]/route.ts
import { Nile } from '@niledatabase/server'
import { nextJs } from '@niledatabase/nextjs'
export const nile = Nile({ extensions: [nextJs] });

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Server actions and RSC

The build-in components found in @niledatabase/react will request information client side. If you’d like to hydrate them, @niledatabase/server functions can be called.

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Example: Verify email address

app/verify-email/page.tsx
import { UserInfo } from "@niledatabase/react";
import { nile } from "../api/[...nile]/nile";

export default async function VerifyEmail() {
  const me = await nile.users.getSelf(); // either the json parsed user, or a request (401)
  if (me instanceof Response) {
    return "You must be logged in.";
  }
  return (
    <div className="w-3xl mx-auto">
      <UserInfo user={me} />
      // rest of component, probably a form with a button that calls the `action` below
    </div>
  );
}
Server actions work in a similar way. Here’s an example of an action that is called to verify a user’s email address. An action like this requires SMTP to be configured in the console. 
async function action() {
  "use server";
  const res = await nile.users.verifySelf({
    callbackUrl: "/dashboard", // customize where the user should land after their email is verified
  }, true);
  if (!res.ok) {
    return { ok: false, message: await res.text() }; // errors are text
  }
  return { ok: true, message: "Check your email for your verification" };
}
nile.users.verifySelf mirrors the client-side call to /api/auth/verify-email. All server side calls can be called from a client based on their configured route.

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Client side

While in most cases, actions would be used to handle the calls to nile-auth, it is possible to use @niledatabase/react which can do a lot of the heavy lifting for you, especially when it comes to client-side authorization, or quickly getting a demo app up and running.

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Example: Hydrated sign up / dashboard page

import {
  SignOutButton,
  SignUpForm,
  SignedIn,
  SignedOut,
  TenantSelector,
  UserInfo,
} from "@niledatabase/react";
import { nile } from "../api/[...nile]/nile";
import { Tenant, User } from "@niledatabase/server";

export default async function SignUpPage() {
  // be sure nothing happens on the edge
  const [session, me, tenants] = await nile.withContext(async (ctx) => Promise.all([
    ctx.auth.getSession<any>(),
    ctx.users.getSelf<User>(),
    ctx.tenants.list<Tenant[]>(),
  ]);
  return (
    <div className="flex flex-col items-center justify-center min-h-screen">
      <SignedIn className="flex flex-col gap-4" session={session}>
        <UserInfo user={me} />
        <TenantSelector className="py-6 mb-10" tenants={tenants} />
        <SignOutButton />
      </SignedIn>
      <SignedOut session={session}>
        <SignUpForm createTenant />
      </SignedOut>
    </div>
  );
}
For something like SSO, the easiest thing to do is create a button for signin in, and @niledatabase/client to handle the rest 

"use client";
import { Button } from "@/components/ui/button";
import { signIn, getSession } from "@niledatabase/client";
export default function AllClient() {
  const session = getSession();
  return (
    <div>
      Session data: {session ? JSON.stringify(session) : null}
      <Button
        onClick={() => {
          signIn("google", { callbackUrl: "/allClientSide" });
        }}
      >
        Sign in to google
      </Button>
    </div>
  );
}
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