feat(auth): add helper to retrieve decrypted user HF tokens

src/lib/server/userTokens.ts

@@ -0,0 +1,24 @@
+import { collections } from "./database";
+import { decryptToken } from "./tokenEncryption";
+import type { ObjectId } from "mongodb";
+
+/**
+ * Retrieves and decrypts a user's Hugging Face token if available
+ */
+export async function getUserHFToken(userId: ObjectId): Promise<string | null> {
+	const userToken = await collections.userTokens.findOne({
+		userId,
+		provider: "huggingface",
+	});
+
+	if (!userToken) {
+		return null;
+	}
+
+	try {
+		return decryptToken(userToken.encryptedToken);
+	} catch (error) {
+		console.error("Failed to decrypt user token:", error);
+		return null;
+	}
+}