validate if user exist

packages/server/src/controllers/AuthController/endpoints/dataValidation.js

@@ -0,0 +1,37 @@
+import { User } from "@models"
+
+export default {
+    method: "GET",
+    route: "/login/validation",
+    fn: async function (req, res) {
+        // just check if the provided user or/and email exists, if is return false, otherwise return true
+        const { username, email } = req.query
+
+        if (!username && !email) {
+            return res.status(400).json({
+                message: "Missing username or email",
+            })
+        }
+
+        const user = await User.findOne({
+            $or: [
+                { username: username },
+                { email: email },
+            ]
+        }).catch((error) => {
+            return false
+        })
+
+        if (user) {
+            return res.json({
+                message: "User already exists",
+                exists: true,
+            })
+        } else {
+            return res.json({
+                message: "User doesn't exists",
+                exists: false,
+            })
+        }
+    }
+}