diff --git a/src/Entity/Project/Project.php b/src/Entity/Project/Project.php
index d91b71a..2487053 100644
--- a/src/Entity/Project/Project.php
+++ b/src/Entity/Project/Project.php
@@ -9,11 +9,14 @@
 use App\Entity\Trait\TimestampedCreationEntity;
 use App\Entity\Trait\TimestampedUpdationEntity;
 use App\Entity\User\User;
+use App\Mapping\Provider\EntityMapProvider;
 use App\Repository\Project\ProjectRepository;
+use AutoMapper\Attribute\MapProvider;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 
+#[MapProvider(EntityMapProvider::class)]
 #[ORM\Entity(repositoryClass: ProjectRepository::class)]
 class Project implements UserOwnedInterface, AccountingOwnerInterface
 {
diff --git a/src/Entity/Project/Reward.php b/src/Entity/Project/Reward.php
index 7d9e4e1..eca3970 100644
--- a/src/Entity/Project/Reward.php
+++ b/src/Entity/Project/Reward.php
@@ -3,7 +3,9 @@
 namespace App\Entity\Project;
 
 use App\Entity\Money;
+use App\Mapping\Provider\EntityMapProvider;
 use App\Repository\Project\RewardRepository;
+use AutoMapper\Attribute\MapProvider;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\DBAL\Types\Types;
@@ -12,6 +14,7 @@
 /**
  * A ProjectReward is something the Project owner wishes to give in exchange for contributions to their Project.
  */
+#[MapProvider(EntityMapProvider::class)]
 #[ORM\Entity(repositoryClass: RewardRepository::class)]
 class Reward
 {
diff --git a/src/Entity/User/User.php b/src/Entity/User/User.php
index d913e88..a29fba4 100644
--- a/src/Entity/User/User.php
+++ b/src/Entity/User/User.php
@@ -8,7 +8,9 @@
 use App\Entity\Trait\MigratedEntity;
 use App\Entity\Trait\TimestampedCreationEntity;
 use App\Entity\Trait\TimestampedUpdationEntity;
+use App\Mapping\Provider\EntityMapProvider;
 use App\Repository\User\UserRepository;
+use AutoMapper\Attribute\MapProvider;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
@@ -24,10 +26,11 @@
  * This allows to keep an User's "wallet", withholding their non-raised fundings into their Accounting.
  */
 #[Gedmo\Loggable()]
-#[UniqueEntity(fields: ['username'], message: 'This usernames already exists.')]
-#[UniqueEntity(fields: ['email'], message: 'This email address is already registered.')]
+#[MapProvider(EntityMapProvider::class)]
 #[ORM\Entity(repositoryClass: UserRepository::class)]
 #[ORM\Index(fields: ['migratedId'])]
+#[UniqueEntity(fields: ['username'], message: 'This usernames already exists.')]
+#[UniqueEntity(fields: ['email'], message: 'This email address is already registered.')]
 class User implements UserInterface, PasswordAuthenticatedUserInterface, AccountingOwnerInterface
 {
     use MigratedEntity;
@@ -68,7 +71,7 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface, Account
     /**
      * The projects owned by this User.
      */
-    #[ORM\OneToMany(mappedBy: 'owner', targetEntity: Project::class)]
+    #[ORM\OneToMany(mappedBy: 'owner', targetEntity: Project::class, cascade: ['persist'])]
     private Collection $projects;
 
     /**
diff --git a/src/Mapping/AutoMapper.php b/src/Mapping/AutoMapper.php
index 9e871b2..94053ca 100644
--- a/src/Mapping/AutoMapper.php
+++ b/src/Mapping/AutoMapper.php
@@ -15,7 +15,7 @@ public function __construct(
         iterable $mapProviders,
     ) {
         $this->innerMapper = InnerMapper::create(
-            providers: $mapProviders
+            providers: \iterator_to_array($mapProviders)
         );
     }
 
diff --git a/src/Mapping/Provider/EntityMapProvider.php b/src/Mapping/Provider/EntityMapProvider.php
new file mode 100644
index 0000000..c2bce41
--- /dev/null
+++ b/src/Mapping/Provider/EntityMapProvider.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Mapping\Provider;
+
+use AutoMapper\Provider\ProviderInterface;
+use Doctrine\ORM\EntityManagerInterface;
+
+class EntityMapProvider implements ProviderInterface
+{
+    public function __construct(
+        private EntityManagerInterface $entityManager
+    ) {}
+
+    public function provide(string $targetType, mixed $source, array $context): object|array|null
+    {
+        if (!isset($source->id)) {
+            return null;
+        }
+
+        $repository = $this->entityManager->getRepository($targetType);
+
+        if (!$repository) {
+            throw new \Exception(\sprintf("No repository found for '' class. Is it an Entity?", $targetType));
+        }
+
+        return $repository->find($source->id);
+    }
+}