add: full multi-tenancy control

app/Http/Controllers/SuperAdmin/SessionController.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Http\Controllers\SuperAdmin;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+
+class SessionController extends Controller
+{
+    public function create()
+    {
+        if (Auth::check() && Auth::user()->email === 'admin@example.com') {
+            return redirect()->route('super-admin.tenants.index');
+        }
+        return view('super-admin.session.login');
+    }
+
+    public function store(Request $request)
+    {
+        $credentials = $request->validate([
+            'email' => ['required', 'email'],
+            'password' => ['required'],
+        ]);
+
+        if (Auth::attempt($credentials)) {
+            $request->session()->regenerate();
+
+            if (Auth::user()->email !== 'admin@example.com') {
+                Auth::logout();
+                return back()->withErrors([
+                    'email' => 'Unauthorized access.',
+                ]);
+            }
+
+            return redirect()->route('super-admin.tenants.index');
+        }
+
+        return back()->withErrors([
+            'email' => 'The provided credentials do not match our records.',
+        ]);
+    }
+
+    public function destroy(Request $request)
+    {
+        Auth::logout();
+        $request->session()->invalidate();
+        $request->session()->regenerateToken();
+        return redirect()->route('super-admin.session.create');
+    }
+}