Updated members layer1 to handle create/destroy/get jwt token

closes #11

- Uses signed jwt with NONE algorithm
- Token stored in localStorage

ghost/sdk/layer1/index.js

@@ -1,15 +1,22 @@
+const jwt = require('jsonwebtoken');
+const store = window.localStorage;
+
 const create = (options) => {
     return {
         getToken() {
-            return Promise.resolve();
+            let token = store.getItem('members-token') || null;
+            return Promise.resolve(token);
         },
 
         login() {
-            return Promise.resolve();
+            let token = jwt.sign({}, null, {algorithms: ['none']});
+            store.setItem('members-token', token);
+            return Promise.resolve(!!token);
         },
 
         logout() {
-            return Promise.resolve();
+            store.setItem('members-token', null);
+            return Promise.resolve(true);
         }
     }
 };

ghost/sdk/layer1/package.json

@@ -20,6 +20,7 @@
     "sinon": "7.0.0"
   },
   "dependencies": {
-    "ghost-ignition": "^2.9.6"
+    "ghost-ignition": "^2.9.6",
+    "jsonwebtoken": "^8.3.0"
   }
 }