finalised client APIs and authentication method

server/api/v1/client/auth/callback/index.get.ts

@@ -0,0 +1,27 @@
+import clientHandler from "~/server/internal/clients/handler";
+
+export default defineEventHandler(async (h3) => {
+  const userId = await h3.context.session.getUserId(h3);
+  if (!userId) throw createError({ statusCode: 403 });
+
+  const query = getQuery(h3);
+  const providedClientId = query.id?.toString();
+  if (!providedClientId)
+    throw createError({
+      statusCode: 400,
+      statusMessage: "Provide client ID in request params as 'id'",
+    });
+
+  const data = await clientHandler.fetchClientMetadata(
+    providedClientId
+  );
+  if (!data)
+    throw createError({
+      statusCode: 404,
+      statusMessage: "Request not found.",
+    });
+
+  await clientHandler.attachUserId(providedClientId, userId);
+
+  return data;
+});