Fix store credentials

app/uploaders/object_store_uploader.rb

@@ -20,6 +20,14 @@ class ObjectStoreUploader < CarrierWave::Uploader::Base
     def object_store_enabled?
       object_store_options&.enabled
     end
+
+    def object_store_credentials
+      @object_store_credentials ||= object_store_options&.connection&.to_hash&.deep_symbolize_keys
+    end
+
+    def object_store_directory
+      object_store_options&.remote_directory
+    end
   end
 
   attr_reader :subject, :field
@@ -98,11 +106,11 @@ class ObjectStoreUploader < CarrierWave::Uploader::Base
   end
 
   def fog_directory
-    self.class.object_store_options.remote_directory
+    self.class.object_store_directory
   end
 
   def fog_credentials
-    self.class.object_store_options.connection
+    self.class.object_store_credentials
   end
 
   def fog_public

spec/support/stub_artifacts.rb

@@ -7,7 +7,7 @@ module StubConfiguration
 
     return unless enabled
 
-    ::Fog::Storage.new(Gitlab.config.artifacts.object_store.connection).tap do |connection|
+    ::Fog::Storage.new(ArtifactUploader.object_store_credentials).tap do |connection|
       begin
         connection.directories.create(key: 'artifacts')
       rescue Excon::Error::Conflict

spec/uploaders/object_store_uploader_spec.rb

@@ -239,7 +239,7 @@ describe ObjectStoreUploader do
   end
 
   describe '#fog_credentials' do
-    let(:connection) { 'connection' }
+    let(:connection) { Settingslogic.new("provider" => "AWS") }
 
     before do
       uploader_class.storage_options double(
@@ -248,7 +248,7 @@ describe ObjectStoreUploader do
 
     subject { uploader.fog_credentials }
 
-    it { is_expected.to eq(connection) }
+    it { is_expected.to eq(provider: 'AWS') }
   end
 
   describe '#fog_public' do