feat: add patreon social provider (#6245)

Co-authored-by: benkingcode <ben@lionfeet.com>
Co-authored-by: Kinfe123 <kinfishtech@gmail.com>

docs/content/docs/plugins/generic-oauth.mdx

@@ -138,12 +138,13 @@ Better Auth provides pre-configured helper functions for popular OAuth providers
 - **Microsoft Entra ID (Azure AD)** - `microsoftEntraId(options)`
 - **Okta** - `okta(options)`
 - **Slack** - `slack(options)`
+- **Patreon** - `patreon(options)`
 
 ### Example: Using Pre-configured Providers
 
 ```ts title="auth.ts"
 import { betterAuth } from "better-auth"
-import { genericOAuth, auth0, hubspot, keycloak, line, microsoftEntraId, okta, slack } from "better-auth/plugins"
+import { genericOAuth, auth0, hubspot, keycloak, line, microsoftEntraId, okta, slack, patreon } from "better-auth/plugins"
 
 export const auth = betterAuth({
   plugins: [
@@ -189,6 +190,10 @@ export const auth = betterAuth({
           clientId: process.env.SLACK_CLIENT_ID,
           clientSecret: process.env.SLACK_CLIENT_SECRET,
         }),
+        patreon({
+          clientId: process.env.PATREON_CLIENT_ID,
+          clientSecret: process.env.PATREON_CLIENT_SECRET,
+        }),
       ],
     }),
   ],
@@ -204,6 +209,7 @@ Each provider helper accepts common OAuth options (extending `BaseOAuthProviderO
 - **Microsoft Entra ID**: Requires `tenantId` (can be a GUID, `"common"`, `"organizations"`, or `"consumers"`)
 - **Okta**: Requires `issuer` (e.g., `https://dev-xxxxx.okta.com/oauth2/default`)
 - **Slack**: No additional required fields
+- **Patreon**: No additional required fields
 
 All providers support the same optional fields:
 - `scopes?: string[]` - Array of OAuth scopes to request

packages/better-auth/src/plugins/generic-oauth/providers/index.ts

@@ -32,4 +32,5 @@ export {
 	microsoftEntraId,
 } from "./microsoft-entra-id";
 export { type OktaOptions, okta } from "./okta";
+export { type PatreonOptions, patreon } from "./patreon";
 export { type SlackOptions, slack } from "./slack";

packages/better-auth/src/plugins/generic-oauth/providers/patreon.ts

@@ -0,0 +1,83 @@
+import type { OAuth2Tokens, OAuth2UserInfo } from "@better-auth/core/oauth2";
+import { betterFetch } from "@better-fetch/fetch";
+import type { BaseOAuthProviderOptions, GenericOAuthConfig } from "../index";
+
+export interface PatreonOptions extends BaseOAuthProviderOptions {}
+
+interface PatreonProfile {
+	data: {
+		id: string;
+		attributes: {
+			full_name: string;
+			email: string;
+			image_url: string;
+			is_email_verified: boolean;
+		};
+	};
+}
+
+/**
+ * Patreon OAuth provider helper
+ *
+ * @example
+ * ```ts
+ * import { genericOAuth, patreon } from "better-auth/plugins/generic-oauth";
+ *
+ * export const auth = betterAuth({
+ *   plugins: [
+ *     genericOAuth({
+ *       config: [
+ *         patreon({
+ *           clientId: process.env.PATREON_CLIENT_ID,
+ *           clientSecret: process.env.PATREON_CLIENT_SECRET,
+ *         }),
+ *       ],
+ *     }),
+ *   ],
+ * });
+ * ```
+ */
+export function patreon(options: PatreonOptions): GenericOAuthConfig {
+	const defaultScopes = ["identity[email]"];
+
+	const getUserInfo = async (
+		tokens: OAuth2Tokens,
+	): Promise<OAuth2UserInfo | null> => {
+		const { data: profile, error } = await betterFetch<PatreonProfile>(
+			"https://www.patreon.com/api/oauth2/v2/identity?fields[user]=email,full_name,image_url,is_email_verified",
+			{
+				method: "GET",
+				headers: {
+					Authorization: `Bearer ${tokens.accessToken}`,
+				},
+			},
+		);
+
+		if (error || !profile) {
+			return null;
+		}
+
+		return {
+			id: profile.data.id,
+			name: profile.data.attributes.full_name,
+			email: profile.data.attributes.email,
+			image: profile.data.attributes.image_url,
+			emailVerified: profile.data.attributes.is_email_verified,
+		};
+	};
+
+	return {
+		providerId: "patreon",
+		authorizationUrl: "https://www.patreon.com/oauth2/authorize",
+		tokenUrl: "https://www.patreon.com/api/oauth2/token",
+		clientId: options.clientId,
+		clientSecret: options.clientSecret,
+		scopes: options.scopes ?? defaultScopes,
+		redirectURI: options.redirectURI,
+		pkce: options.pkce,
+		disableImplicitSignUp: options.disableImplicitSignUp,
+		disableSignUp: options.disableSignUp,
+		overrideUserInfo: options.overrideUserInfo,
+		getUserInfo,
+	};
+}