DynamoDB

This is the AWS DynamoDB Adapter for next-auth. This package can only be used in conjunction with the primary next-auth package. It is not a standalone package.

By default, the adapter expects a table with a partition key pk and a sort key sk, as well as a global secondary index named GSI1 with GSI1PK as partition key and GSI1SK as sorting key. To automatically delete sessions and verification requests after they expire using dynamodb TTL you should enable the TTL with attribute name 'expires'. You can set whatever you want as the table name and the billing method.

You can find the full schema in the table structure section below.

Getting Started

1. Install next-auth and @next-auth/dynamodb-adapter

npm install next-auth @next-auth/dynamodb-adapter

2. Add this adapter to your pages/api/auth/[...nextauth].js next-auth configuration object.

You need to pass DynamoDBDocument client from the modular aws-sdk v3 to the adapter. The default table name is next-auth, but you can customise that by passing { tableName: 'your-table-name' } as the second parameter in the adapter.

pages/api/auth/[...nextauth].js

import { DynamoDB } from "@aws-sdk/client-dynamodb"
import { DynamoDBDocument } from "@aws-sdk/lib-dynamodb"
import NextAuth from "next-auth";
import Providers from "next-auth/providers";
import { DynamoDBAdapter } from "@next-auth/dynamodb-adapter"

const config: DynamoDBClientConfig = {
  credentials: {
    accessKeyId: process.env.NEXT_AUTH_AWS_ACCESS_KEY as string,
    secretAccessKey: process.env.NEXT_AUTH_AWS_SECRET_KEY as string,
  },
  region: process.env.NEXT_AUTH_AWS_REGION,
};

const client = DynamoDBDocument.from(new DynamoDB(config), {
  marshallOptions: {
    convertEmptyValues: true,
    removeUndefinedValues: true,
    convertClassInstanceToMap: true,
  },
})

export default NextAuth({
  // Configure one or more authentication providers
  providers: [
    Providers.GitHub({
      clientId: process.env.GITHUB_ID,
      clientSecret: process.env.GITHUB_SECRET,
    }),
    Providers.Email({
      server: process.env.EMAIL_SERVER,
      from: process.env.EMAIL_FROM,
    }),
    // ...add more providers here
  ],
  adapter: DynamoDBAdapter(
    client
  ),
  ...
});

(AWS secrets start with NEXT_AUTH_ in order to not conflict with Vercel's reserved environment variables.)

Schema

The table respects the single table design pattern. This has many advantages:

• Only one table to manage, monitor and provision.
• Querying relations is faster than with multi-table schemas (for eg. retrieving all sessions for a user).
• Only one table needs to be replicated, if you want to go multi-region.

This schema is adapted for use in DynamoDB and based upon our main schema

You can create this table with infrastructure as code using aws-cdk with the following table definition:

stack.ts

new dynamodb.Table(this, `NextAuthTable`, {
  tableName: "next-auth",
  partitionKey: { name: "pk", type: dynamodb.AttributeType.STRING },
  sortKey: { name: "sk", type: dynamodb.AttributeType.STRING },
  timeToLiveAttribute: "expires",
}).addGlobalSecondaryIndex({
  indexName: "GSI1",
  partitionKey: { name: "GSI1PK", type: dynamodb.AttributeType.STRING },
  sortKey: { name: "GSI1SK", type: dynamodb.AttributeType.STRING },
})

Alternatively you can use this cloudformation template:

cloudformation.yaml

NextAuthTable:
  Type: "AWS::DynamoDB::Table"
  Properties:
    TableName: next-auth
    AttributeDefinitions:
      - AttributeName: pk
        AttributeType: S
      - AttributeName: sk
        AttributeType: S
      - AttributeName: GSI1PK
        AttributeType: S
      - AttributeName: GSI1SK
        AttributeType: S
    KeySchema:
      - AttributeName: pk
        KeyType: HASH
      - AttributeName: sk
        KeyType: RANGE
    GlobalSecondaryIndexes:
      - IndexName: GSI1
        Projection:
          ProjectionType: ALL
        KeySchema:
          - AttributeName: GSI1PK
            KeyType: HASH
          - AttributeName: GSI1SK
            KeyType: RANGE
    TimeToLiveSpecification:
      AttributeName: expires
      Enabled: true

Custom Schema

You can configure your custom table schema by passing the options key to the adapter constructor:

const adapter = DynamoDBAdapter(client, {
  tableName: "custom-table-name",
  partitionKey: "custom-pk",
  sortKey: "custom-sk",
  indexName: "custom-index-name",
  indexPartitionKey: "custom-index-pk",
  indexSortKey: "custom-index-sk",
})