♻️ (viewer) Remove barrel exports and flatten folder arch

apps/viewer/src/helpers/authenticateUser.ts

@@ -0,0 +1,19 @@
+import { User } from '@typebot.io/prisma'
+import { NextApiRequest } from 'next'
+import prisma from '@/lib/prisma'
+
+export const authenticateUser = async (
+  req: NextApiRequest
+): Promise<User | undefined> => authenticateByToken(extractBearerToken(req))
+
+const authenticateByToken = async (
+  apiToken?: string
+): Promise<User | undefined> => {
+  if (!apiToken) return
+  return (await prisma.user.findFirst({
+    where: { apiTokens: { some: { token: apiToken } } },
+  })) as User
+}
+
+const extractBearerToken = (req: NextApiRequest) =>
+  req.headers['authorization']?.slice(7)