feat(providers): Add Pinterest Provider (#5485)

* feat(providers): Add Pinterest Provider

* Apply suggestions from code review

* Update pinterest.ts

* Update pinterest.ts

* Apply suggestions from code review

Co-authored-by: Balázs Orbán <info@balazsorban.com>

Author: ranjan-purbey

docs/docs/providers/pinterest.md

@@ -0,0 +1,37 @@
+---
+id: pinterest
+title: Pinterest
+---
+
+## Documentation
+
+https://developers.pinterest.com/docs/getting-started/authentication/
+
+## Configuration
+
+https://developers.pinterest.com/apps/
+
+## Options
+
+The **Pinterest Provider** comes with a set of default options:
+
+- [Pinterest Provider options](https://github.com/nextauthjs/next-auth/blob/main/packages/next-auth/src/providers/pinterest.ts)
+
+You can override any of the options to suit your own use case.
+
+## Example
+
+```ts
+import PinterestProvider from "next-auth/providers/pinterest"
+...
+providers: [
+  PinterestProvider({
+    clientId: process.env.PINTEREST_ID,
+    clientSecret: process.env.PINTEREST_SECRET
+  })
+]
+...
+
+:::tip
+To use in production, make sure the app has standard API access and not trial access
+:::

packages/next-auth/src/providers/pinterest.ts

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+import { OAuthConfig, OAuthUserConfig } from "."
+
+export interface PinterestProfile extends Record<string, any> {
+  account_type: "BUSINESS" | "PINNER"
+  profile_image: string
+  website_url: string
+  username: string
+}
+
+export default function PinterestProvider<P extends PinterestProfile>(
+  options: OAuthUserConfig<P>
+): OAuthConfig<P> {
+  return {
+    id: "pinterest",
+    name: "Pinterest",
+    type: "oauth",
+    authorization: {
+      url: "https://www.pinterest.com/oauth",
+      params: { scope: "user_accounts:read" },
+    },
+    checks: ["state"],
+    token: "https://api.pinterest.com/v5/oauth/token",
+    userinfo: "https://api.pinterest.com/v5/user_account",
+    profile({ username, profile_image }) {
+      return {
+        id: username,
+        name: username,
+        image: profile_image,
+        email: null,
+      }
+    },
+    options,
+  }
+}