Auth logic is completed (signin, signup, logout), Added: Middlewares, RequireAuth middleware

app/views/auth/signin.php

@@ -1,9 +1,21 @@
 <section class="signin">
-  <form>
-    <label for="username">Username</label>
-    <input type="text" name="username" id="username">
-    <label for="password">Password</label>
-    <input type="password" name="password" id="password">
-    <input type="submit" value="Sign In" id="submit-signin">
-  </form>
+    <?php if ($this->get('error')): ?>
+        <div class="error"><?= $this->get('error') ?></div>
+    <?php endif; ?>
+
+    <form action="/auth/signin" method="POST">
+        <label for="email">Email</label>
+        <input type="email" name="email" id="email" value="<?= htmlspecialchars($_POST['email'] ?? '') ?>" required>
+        <?php if (isset($this->get('validationErrors')['email'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['email'] ?></small>
+        <?php endif; ?>
+
+        <label for="password">Password</label>
+        <input type="password" name="password" id="password" required>
+        <?php if (isset($this->get('validationErrors')['password'])): ?>
+            <small class="error"><?= $this->get('validationErrors')['password'] ?></small>
+        <?php endif; ?>
+
+        <input type="submit" value="Sign In">
+    </form>
 </section>