Add setters for the existing entities.

app/src/Domain/Entity.php

@@ -7,9 +7,14 @@ use DateTimeImmutable;
 
 trait Entity
 {
-    protected int $id;
-    protected DateTimeImmutable $createdAt;
-    protected DateTime $updatedAt;
+    protected ?int $id;
+    protected ?DateTimeImmutable $createdAt;
+    protected ?DateTime $updatedAt;
+
+    public function isNew(): bool
+    {
+        return (bool) $this->id;
+    }
 
     public function setId(int $id): void
     {

app/src/Domain/Entity/Channel.php

@@ -10,7 +10,7 @@ class Channel
     
     public function __construct(
         private string $name,
-        private ?string $description = '',
+        private string $description,
         private ?string $link = '',
         private ?string $language = '',
         private ?string $copyright = '',
@@ -32,16 +32,45 @@ class Channel
         return $this->link;
     }
 
+    public function setLink(string $link): Channel
+    {
+        $this->link = $link;
+        return $this;
+    }
+
     public function getLanguage(): string
     {
         return $this->language;
     }
 
+    public function setLanguage(string $language): Channel
+    {
+        $this->language = $language;
+        return $this;
+    }
+
     public function getCopyright(): string
     {
         return $this->copyright;
     }
 
+    public function setCopyright(string $copyright): Channel
+    {
+        $this->copyright = $copyright;
+        return $this;
+    }
+
+    public function isExplicit(): bool
+    {
+        return $this->explicit;
+    }
+
+    public function setExplicit(bool $explicit): Channel
+    {
+        $this->explicit = $explicit;
+        return $this;
+    }
+
     /**
      * @param array $props The properties of the Channel model
      * @return Channel

app/src/Domain/Entity/User.php

@@ -19,24 +19,32 @@ class User
         return $this->email;
     }
 
+    public function setEmail(string $email): User
+    {
+        $this->email = $email;
+        return $this;
+    }
+
     public function getPassword(): string
     {
         return $this->password;
     }
 
+    public function setPassword(string $password): User
+    {
+        $this->password = $password;
+        return $this;
+    }
+
     public function getName(): string
     {
         return $this->name;
     }
 
-    /**
-     * If the `id` property exists, we can assume this entity already exists.
-     *
-     * @return bool
-     */
-    public function isNew(): bool
+    public function setName(string $name): User
     {
-        return (bool) $this->getId();
+        $this->name = $name;
+        return $this;
     }
 
     /**
@@ -45,18 +53,19 @@ class User
      */
     public static function fromArray(array $props): User
     {
-        $user = new self(
-            $props['email'],
-            $props['password'],
-            $props['name']
-        );
+        $user = new self($props['email'], $props['password'], $props['name']);
 
         if ($props['id']) {
             $user->setId($props['id']);
         }
 
-        $user->setCreatedAt($props['createdAt']);
-        $user->setUpdatedAt($props['updatedAt']);
+        if ($props['createdAt']) {
+            $user->setCreatedAt($props['createdAt']);
+        }
+
+        if ($props['updatedAt']) {
+            $user->setUpdatedAt($props['updatedAt']);
+        }
 
         return $user;
     }