add graphql-tag

+import gql from "graphql-tag";
+
+const clientQuery = gql`
+  {
+    isLoggedIn @client
+  }
+`;
+
 export const defaults = {
   isLoggedIn: Boolean(localStorage.getItem("token") || false),
 };
@@ -24,4 +32,7 @@ export const resolvers = {
       return null;
     },
   },
+  Query: {
+    clientQuery,
+  },
 };