Adding API key to spamcheck call

lib/gitlab/spamcheck/client.rb

@@ -40,7 +40,8 @@ module Gitlab
       def issue_spam?(spam_issue:, user:, context: {})
         issue = build_issue_protobuf(issue: spam_issue, user: user, context: context)
 
-        response = @stub.check_for_spam_issue(issue)
+        response = @stub.check_for_spam_issue(issue, metadata: 
+                                              {'authorization' => ENV['SPAMCHECK_APIKEY']})
         verdict = convert_verdict_to_gitlab_constant(response.verdict)
         [verdict, response.error]
       end