added using crawlera section in using proxies tutorial

Author: x4nth055

web-scraping/using-proxies/using-crawlera.py

@@ -0,0 +1,12 @@
+import requests
+
+url = "http://icanhazip.com"
+proxy_host = "proxy.crawlera.com"
+proxy_port = "8010"
+proxy_auth = ":"
+proxies = {
+       "https": f"https://{proxy_auth}@{proxy_host}:{proxy_port}/",
+       "http": f"http://{proxy_auth}@{proxy_host}:{proxy_port}/"
+}
+
+r = requests.get(url, proxies=proxies, verify=False)