Update building-a-login-with-github-button-with-a-github-app.md

Remove unnecessary body from http get request

content/apps/creating-github-apps/writing-code-for-a-github-app/building-a-login-with-github-button-with-a-github-app.md

@@ -340,12 +340,10 @@ def user_info(token)
   uri = URI("{% data variables.product.rest_url %}/user")
 
   result = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
-    body = {"access_token" => token}.to_json
-
     auth = "Bearer #{token}"
     headers = {"Accept" => "application/json", "Content-Type" => "application/json", "Authorization" => auth}
 
-    http.send_request("GET", uri.path, body, headers)
+    http.send_request("GET", uri.path, nil, headers)
   end
 
   parse_response(result)