check user_signed_in at applied job button

app/views/jobs/show.html.erb

@@ -31,7 +31,7 @@
     <%= @job.description.html_safe %>
   </div>
   <div class="col-2">
-    <% is_not_applied = current_user.applied_jobs.find_by(job_id: @job.id).blank? %>
+    <% is_not_applied = user_signed_in? ? current_user.applied_jobs.find_by(job_id: @job.id).blank? : true %>
     <%= link_to_if is_not_applied, 'Apply Now', new_applied_job_path(job_id: @job.id), class: 'btn btn-outline-success btn-lg' do %>
       <%= link_to 'Apply Now', '#', class: 'btn btn-outline-secondary btn-lg disabled' %>
     <% end %>