Switch to async/await syntax

aiohttp_security/cookies_identity.py

@@ -5,8 +5,6 @@ more handy.
 
 """
 
-import asyncio
-
 from .abc import AbstractIdentityPolicy
 
 
@@ -19,19 +17,16 @@ class CookiesIdentityPolicy(AbstractIdentityPolicy):
         self._cookie_name = 'AIOHTTP_SECURITY'
         self._max_age = 30 * 24 * 3600
 
-    @asyncio.coroutine
-    def identify(self, request):
+    async def identify(self, request):
         identity = request.cookies.get(self._cookie_name)
         return identity
 
-    @asyncio.coroutine
-    def remember(self, request, response, identity, max_age=sentinel,
-                 **kwargs):
+    async def remember(self, request, response, identity, max_age=sentinel,
+                       **kwargs):
         if max_age is sentinel:
             max_age = self._max_age
         response.set_cookie(self._cookie_name, identity,
                             max_age=max_age, **kwargs)
 
-    @asyncio.coroutine
-    def forget(self, request, response):
+    async def forget(self, request, response):
         response.del_cookie(self._cookie_name)