Cover all transformers.

app/Repositories/User/UserRepository.php

@@ -217,6 +217,22 @@ class UserRepository implements UserRepositoryInterface
         return Role::where('name', $role)->first();
     }
 
+    /**
+     * @param User $user
+     *
+     * @return string|null
+     */
+    public function getRoleByUser(User $user): ?string
+    {
+        /** @var Role $role */
+        $role = $user->roles()->first();
+        if (null !== $role) {
+            return $role->name;
+        }
+
+        return null;
+    }
+
     /**
      * Return basic user information.
      *

app/Repositories/User/UserRepositoryInterface.php

@@ -31,6 +31,13 @@ use Illuminate\Support\Collection;
  */
 interface UserRepositoryInterface
 {
+
+    /**
+     * @param User $user
+     *
+     * @return string|null
+     */
+    public function getRoleByUser(User $user): ?string;
     /**
      * Returns a collection of all users.
      *