added UserFactory and UserTest.php

app/Models/Traffic.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * App\Traffic
+ *
+ * @property int $id
+ * @property int $user_id
+ * @property int $upload
+ * @property int $download
+ * @property \Illuminate\Support\Carbon|null $created_at
+ * @property \Illuminate\Support\Carbon|null $updated_at
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic newModelQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic newQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic query()
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic whereCreatedAt($value)
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic whereDownload($value)
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic whereId($value)
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic whereUpdatedAt($value)
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic whereUpload($value)
+ * @method static \Illuminate\Database\Eloquent\Builder|Traffic whereUserId($value)
+ * @mixin \Eloquent
+ */
+class Traffic extends Model
+{
+    protected $fillable = ['user_id', 'upload', 'download'];
+}