Expand test code for create export routine.

app/Repositories/User/UserRepository.php

@@ -158,6 +158,7 @@ class UserRepository implements UserRepositoryInterface
     /**
      * @param int $userId
      *
+     * @deprecated
      * @return User
      */
     public function find(int $userId): User
@@ -180,6 +181,16 @@ class UserRepository implements UserRepositoryInterface
         return User::where('email', $email)->first();
     }
 
+    /**
+     * @param int $userId
+     *
+     * @return User|null
+     */
+    public function findNull(int $userId): ?User
+    {
+        return User::find($userId);
+    }
+
     /**
      * Returns the first user in the DB. Generally only works when there is just one.
      *

app/Repositories/User/UserRepositoryInterface.php

@@ -103,11 +103,17 @@ interface UserRepositoryInterface
 
     /**
      * @param int $userId
-     *
+     * @deprecated
      * @return User
      */
     public function find(int $userId): User;
 
+    /**
+     * @param int $userId
+     * @return User|null
+     */
+    public function findNull(int $userId): ?User;
+
     /**
      * @param string $email
      *