ProtectedBranch API omits empty declared params

ee/app/services/ee/protected_branches/api_service.rb

@@ -11,7 +11,7 @@ module EE
         super
       rescue ::EE::ProtectedBranches::ApiService::GroupsNotAccessibleError,
              ::EE::ProtectedBranches::ApiService::UsersNotAccessibleError
-        ProtectedBranch.new.tap do |protected_branch|
+        ::ProtectedBranch.new.tap do |protected_branch|
           message = 'Cannot add users or groups unless they have access to the project'
           protected_branch.errors.add(:base, message)
         end

lib/api/protected_branches.rb

@@ -62,7 +62,8 @@ module API
           conflict!("Protected branch '#{params[:name]}' already exists")
         end
 
-        api_service = ::ProtectedBranches::ApiService.new(user_project, current_user, declared(params))
+        declared_params = declared_params(include_missing: false)
+        api_service = ::ProtectedBranches::ApiService.new(user_project, current_user, declared_params)
         protected_branch = api_service.create
 
         if protected_branch.persisted?