Updated code based on reviewer's comments

lib/gitlab/auth/ldap/user.rb

@@ -11,9 +11,6 @@ module Gitlab
     module Ldap
       class User < Gitlab::Auth::OAuth::User
         extend ::Gitlab::Utils::Override
-        def save
-          super(protocol_name)
-        end
 
         # instance methods
         def find_user

lib/gitlab/auth/o_auth/user.rb

@@ -46,7 +46,7 @@ module Gitlab
           valid? && persisted?
         end
 
-        def save(provider = 'OAuth')
+        def save(provider = protocol_name)
           raise SigninDisabledForProviderError if oauth_provider_disabled?
           raise SignupDisabledError unless gl_user
 
@@ -97,7 +97,7 @@ module Gitlab
         end
 
         def protocol_name
-          ''
+          'OAuth'
         end
 
         protected

lib/gitlab/auth/saml/user.rb

@@ -11,10 +11,6 @@ module Gitlab
       class User < Gitlab::Auth::OAuth::User
         extend ::Gitlab::Utils::Override
 
-        def save
-          super(protocol_name)
-        end
-
         def find_user
           user = find_by_uid_and_provider
 

spec/lib/gitlab/auth/o_auth/user_spec.rb

@@ -587,7 +587,7 @@ RSpec.describe Gitlab::Auth::OAuth::User do
 
           context 'when a sign up user cap has been set up but has not been reached yet' do
             it 'still creates a blocked user' do
-              allow(Gitlab::CurrentSettings).to receive(:new_user_signups_cap).and_return(999)
+              stub_application_setting(new_user_signups_cap: 999)
 
               oauth_user.save # rubocop:disable Rails/SaveBang
               expect(gl_user).to be_valid
@@ -1049,8 +1049,8 @@ RSpec.describe Gitlab::Auth::OAuth::User do
   end
 
   describe '#protocol_name' do
-    it 'is empty' do
-      expect(oauth_user.protocol_name).to eq('')
+    it 'is OAuth' do
+      expect(oauth_user.protocol_name).to eq('OAuth')
     end
   end
 end