Better Auth•2mo ago

OIDC Provider: "No database configuration provided" and plugin not loaded on Vercel

Hi! I’m trying to use the OIDC Provider plugin with Better Auth on a Next.js (App Router) project deployed on Vercel. My DATABASE_URL and BETTER_AUTH_SECRET environment variables are correctly set (I can see them in my logs). My lib/auth.ts config looks like this:

  export const auth = betterAuth({
    adapter: {
      type: "postgres",
      url: process.env.DATABASE_URL, // I also tried databaseUrl
    },
    secret: process.env.BETTER_AUTH_SECRET,
    plugins: [
      oidcProvider({
        loginPage: "/login",
        // ...
      })
    ]
  });

  export const auth = betterAuth({
    adapter: {
      type: "postgres",
      url: process.env.DATABASE_URL, // I also tried databaseUrl
    },
    secret: process.env.BETTER_AUTH_SECRET,
    plugins: [
      oidcProvider({
        loginPage: "/login",
        // ...
      })
    ]
  });

On every request, I get this warning: [Better Auth]: No database configuration provided. Using memory adapter in development And when I hit /oauth2/authorize, I get a 500 error: TypeError: Cannot read properties of undefined (reading '0') My DATABASE_URL is a NeonDB connection string I’ve tried: Both url and databaseUrl in the adapter config Forcing a password in the connection string Running locally and on Vercel (same issue) Updating to the latest version of better-auth Is there something I’m missing in the configuration? Is the Postgres adapter (with NeonDB) supported on Vercel? Any advice to get the OIDC plugin working with a real database? Thanks a lot for your help!

6 Replies

Vlad•2mo ago

You need to provide an adapter If you don't use an ORM library, use this one

Vlad•2mo ago

https://www.better-auth.com/docs/adapters/postgresql

PostgreSQL | Better Auth

Integrate Better Auth with PostgreSQL.

Vlad•2mo ago

Also the adapter field doesn't exist in the better-auth config lol

RootingOP•2mo ago

ok i see i do that normally its good

RootingOP•2mo ago

but for exemple : https://AUTHdomain/oauth2/authorize?client_id=cyberctf&scope=openid%20email%20profile&response_type=code&redirect_uri=https%3A%2F%2Fcyber-ctf-website-git-test.vercel.app%2Fapi%2Fauth%2Fcallback%2Fbetter-auth&state=NOYB8iARnDGiOOPgVNuXXge6zzZ2IiIZylL6Jf1-UkI I GET : {"error":"OIDC authorize handler not implemented in plugin."}

Vlad•2mo ago

I don't really know what the issue is as I haven't used this plugin. Keep in mind the plugin may not be suitable for production use and make sure you follow all steps https://www.better-auth.com/docs/plugins/oidc-provider

OIDC Provider | Better Auth

Open ID Connect plugin for Better Auth that allows you to have your own OIDC provider.

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OIDC Provider: "No database configuration provided" and plugin not loaded on Vercel

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