Better Auth•5mo ago

legal-consent plugin not extending authClient.signUp.email

Hi all! Just getting to know the plugin ecosystem of better-auth and I must say I am very happy with better-auth so far! When using the legal-consent plugin I have hit a snag, it doesn't seem like it's extending the auth client properly and thus won't pass the tosAccepted and privacyPolicyAccepted fields through to the database resulting in DB errors due to a missing field. I also get the following TS error on the client implementation in the frontend:

Object literal may only specify known properties, and 'tosAccepted' does not exist in type 'Prettify<{ email: string; name: string; password: string; image?: string | undefined; callbackURL?: string | undefined; fetchOptions?: { onRequest: () => void; onSuccess: () => void; onError: (ctx: ErrorContext) => void; } | undefined; }>'.

Object literal may only specify known properties, and 'tosAccepted' does not exist in type 'Prettify<{ email: string; name: string; password: string; image?: string | undefined; callbackURL?: string | undefined; fetchOptions?: { onRequest: () => void; onSuccess: () => void; onError: (ctx: ErrorContext) => void; } | undefined; }>'.

Does anyone have a reference implementation of this plugin or can anyone confirm that it works?

10 Replies

Johan KOP•5mo ago

Ping•5mo ago

Hey @Johan K I'll look into this. By the way, this is part of Better-Auth-Kit, not part of Better-Auth directly. Just an FYI ^ But it's no worries, I'm the creator of BA kit, so I'll look into this 😁

Johan KOP•5mo ago

Sorry about that! I've now found the correct discord :) Thank you for looking into it! Would it be suitable to repost in the other community as well for tracking purposes or is it fine keeping it here?

Ping•5mo ago

It's fine over here

Ping•5mo ago

Hey so I've made some changes to the plugin, please install the latest version. All of your concerns should be address on the legal consent documentation which I've updated. https://www.better-auth-kit.com/docs/plugins/legal-consent

Better Auth Kit

A handy collection of plugins, adapters, libraries and more.

Johan KOP•5mo ago

Thank you for this, I've just gotten the change to try it. Sadly I'm still facing an issue as it is not only the type being extended, but it's not passing the variable to the database at all

2025-05-07T18:36:43.598Z ERROR [Better Auth]: Failed to create user PrismaClientValidationError: 
Invalid `prisma.user.create()` invocation:

{
  data: {
    name: "Johan K",
    email: "REDACTED",
    emailVerified: false,
    createdAt: new Date("2025-05-07T18:36:43.595Z"),
    updatedAt: new Date("2025-05-07T18:36:43.595Z"),
    id: "REDACTED",
+   tosAccepted: Boolean
  },
  select: undefined
}

Argument `tosAccepted` is missing.

2025-05-07T18:36:43.598Z ERROR [Better Auth]: Failed to create user PrismaClientValidationError: 
Invalid `prisma.user.create()` invocation:

{
  data: {
    name: "Johan K",
    email: "REDACTED",
    emailVerified: false,
    createdAt: new Date("2025-05-07T18:36:43.595Z"),
    updatedAt: new Date("2025-05-07T18:36:43.595Z"),
    id: "REDACTED",
+   tosAccepted: Boolean
  },
  select: undefined
}

Argument `tosAccepted` is missing.

Ping•5mo ago

You need to run the better-auth migration CLI if you haven't already

Johan KOP•5mo ago

The columns exist in the database, they're just not getting passed from better-auth to Prisma @Ping Have you had the time to replicate this?

Ping•5mo ago

Hey sorry, been super busy, will look into this asap! By the way, this is definitely an issue on our end. Apologies for that. Hey I just added tests to the legal-consent plugin, and everything looks good on my end. It seems I was wrong about my assumption.

Johan KOP•5mo ago

Let me know of there's anything I can do

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legal-consent plugin not extending authClient.signUp.email

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