added api endpoint for registrar login

app/controllers/repp/v1/registrar/login_controller.rb

@@ -0,0 +1,22 @@
+module Repp
+  module V1
+    module Registrar
+      class LoginController < BaseController
+        api :GET, 'repp/v1/registrar/login'
+        desc 'check login user and return data'
+
+        def index
+          @login = current_user
+
+          # rubocop:disable Style/AndOr
+          render_success(data: nil) and return unless @login
+          # rubocop:enable Style/AndOr
+
+          data = @login.as_json()
+
+          render_success(data: data)
+        end
+      end
+    end
+  end
+end

config/routes.rb

@@ -72,6 +72,11 @@ Rails.application.routes.draw do
             get '/all_notifications', to: 'notifications#all_notifications'
           end
         end
+        resource :login, only: [:index] do
+          collection do
+            get '/', to: 'login#index'
+          end
+        end
         resources :nameservers do
           collection do
             put '/', to: 'nameservers#update'