fix typo

Author: Marco DiDomenico

README.rst

@@ -35,7 +35,7 @@ From your previously configured app, found at https://app.replyify.com/oauth2/ap
 ::
 	REPLYIFY_CLIENT_ID = '{ update me }'
 	REPLYIFY_CLIENT_SECRET = '{ update me }'
-	REPLYIFY_USER_ID_FIELD = 'id'  # or other unique field like `id`
+	REPLYIFY_USER_ID_FIELD = 'id'  # or other primary key user field like `guid`
 
 	INSTALLED_APPS = [
 		...

_README.md

@@ -17,7 +17,7 @@ def inner_decorator(request, *args, **kwargs):
             try:
                 if Credentials.objects.get(user=request.user).is_valid():
                     return func(request, *args, **kwargs)
-            except Credentials.DoesNotExsit:
+            except Credentials.DoesNotExist:
                 return redirect(reverse('replyfy:authorize') + '?next=' + request.GET.get('next', request.path))
             return redirect(reverse('replyfy:refresh') + '?next=' + request.GET.get('next', request.path))
         return wraps(func)(inner_decorator)