Basic tenant structure

app/Providers/TenantUserProvider.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Providers;
+
+use Illuminate\Auth\EloquentUserProvider;
+
+class TenantUserProvider extends EloquentUserProvider
+{
+    public function retrieveByCredentials(array $credentials)
+    {
+        $query = $this->createModel()->newQuery();
+
+        foreach ($credentials as $key => $value) {
+            if (! str_contains($key, 'password')) {
+                $query->where($key, $value);
+            }
+        }
+
+        $query->where('tenant', app('tenant')->slug);
+
+        return $query->first();
+    }
+}