Add type hint for request object

lineandsinker/services/service.py

@@ -1,3 +1,6 @@
+from flask import Request
+
+
 class Service:
     def __init__(self, type):
         self.type = type
@@ -5,5 +8,5 @@ class Service:
     def refresh(self):
         pass
 
-    def accept_hook(self, identifier, request):
+    def accept_hook(self, identifier, request: Request):
         pass