feat(cognito): fetch current jwt

* Added `fetchJwtToken` to the cognito actions. Updated docs and README. (#10)

Author: ArmandoHerra

packages/cognito-module/README.md

@@ -2,7 +2,7 @@
 
 Vuex module to interface with AWS Cognito
 
-Docs Link: Coming Soon!
+Docs Link: [https://cognito.vuetifyjs.com/](https://cognito.vuetifyjs.com/)
 
 Install:
 ```bash

packages/cognito-module/docs/api/actions.md

@@ -7,6 +7,14 @@ Fetches the latest information on the current user and session state.
 this.$store.dispatch('cognito/fetchSession')
 ```
 
+### `fetchJwtToken()`
+
+Fetches the current jwtToken associated with the current user and session when available.
+
+```js
+this.$store.dispatch('cognito/fetchJwtToken')
+```
+
 ### `signInUser({ username: String, password: String })`
 Signs in an already created user and sets user obj in localstorage with `USER` key
 

packages/cognito-module/src/actions.js

@@ -13,6 +13,12 @@ export default {
           }).catch(reject)
       }).catch(reject)
     }),
+  fetchJwtToken: ({ commit }) =>
+    new Promise((resolve, reject) => {
+      Auth.currentSession().then(session => {
+        resolve(session.getAccessToken().getJwtToken())
+      }).catch(reject)
+    }),
   signInUser: ({ commit }, credentials) =>
     new Promise((resolve, reject) => {
       Auth.signIn(credentials.username, credentials.password).then((user) => {