Add info str in raise AccountBlocked

Author: python273

vk_api/vk_api.py

@@ -150,7 +150,7 @@ def vk_login(self, captcha_sid=None, captcha_key=None):
             self.security_check(response=response)
 
         if 'act=blocked' in response.url:
-            raise AccountBlocked()
+            raise AccountBlocked('Account is blocked')
 
     def security_check(self, url=None, response=None):
         if url: