warnings.md

id	title
warnings	Warnings

This is a list of warning output from NextAuth.js.

All warnings indicate things which you should take a look at, but do not inhibit normal operation.

---

Client

NEXTAUTH_URL

Environment variable NEXTAUTH_URL missing. Please set it in your .env file.

:::note On Vercel deployments, we will read the VERCEL_URL environment variable, so you won't need to define NEXTAUTH_URL. :::

---

Server

These warnings are displayed on the terminal.

NO_SECRET

In development, we generate a secret based on your configuration for convenience. This is volatile and will throw an error in production. Read more

TWITTER_OAUTH_2_BETA

Twitter OAuth 2.0 is currently in beta as certain changes might still be necessary. This is not covered by semver. See the docs https://next-auth.js.org/providers/twitter#oauth-2

EXPERIMENTAL_API

Some APIs are still experimental; they may be changed or removed in the future. Use at your own risk.

Adapter

ADAPTER_TYPEORM_UPDATING_ENTITIES

This warning occurs when typeorm finds that the provided entities differ from the database entities. By default while not in production the typeorm adapter will always synchronize changes made to the entities codefiles.

Disable this warning by setting synchronize: false in your typeorm config

Example:

adapter: TypeORMLegacyAdapter({
  type: 'mysql',
  username: process.env.DATABASE_USERNAME,
  password: process.env.DATABASE_PASSWORD,
  host: process.env.DATABASE_HOST,
  database: process.env.DATABASE_DB,
  synchronize: false
}),