diff --git a/changelogs/unreleased/services-usage-5.yml b/changelogs/unreleased/services-usage-5.yml
new file mode 100644
index 0000000000000000000000000000000000000000..04657cf147d752ccfa75f81d674377341d5b6c94
--- /dev/null
+++ b/changelogs/unreleased/services-usage-5.yml
@@ -0,0 +1,5 @@
+---
+title: Use GpgKeys::CreateService when an admin creates a new GPG key for a user
+merge_request: 34737
+author: Rajendra Kadam
+type: fixed
diff --git a/lib/api/users.rb b/lib/api/users.rb
index 5f15787015193f2538b4b60f40bcb9ef1345b4c0..994d27e53deb99c941241a3a90f9184ac1d44da2 100644
--- a/lib/api/users.rb
+++ b/lib/api/users.rb
@@ -328,9 +328,9 @@ def reorder_users(users)
         user = User.find_by(id: params.delete(:id))
         not_found!('User') unless user
 
-        key = user.gpg_keys.new(declared_params(include_missing: false))
+        key = ::GpgKeys::CreateService.new(user, declared_params(include_missing: false)).execute
 
-        if key.save
+        if key.persisted?
           present key, with: Entities::GpgKey
         else
           render_validation_error!(key)