Resolve "Logout of tutors after inactivity"

Closes #22 (closed).

frontend/src/components/Login.vue

@@ -26,7 +26,7 @@
                 type="password"
                 required
                 ></v-text-field>
-              <v-btn type="submit" color="primary">Access</v-btn>
+              <v-btn :loading="loading" type="submit" color="primary">Access</v-btn>
             </v-form>
           </v-flex>
         </v-layout>
@@ -35,6 +35,7 @@
 
 
 <script>
+  import {mapActions, mapState} from 'vuex'
   export default {
     name: 'grady-login',
     data () {
@@ -43,16 +44,30 @@
           username: '',
           password: ''
         },
-        error: ''
+        loading: false
       }
     },
+    computed: {
+      ...mapState([
+        'error'
+      ])
+    },
     methods: {
+      ...mapActions([
+        'getJWTToken',
+        'getExamModule',
+        'getUserRole',
+        'getJWTTimeDelta'
+      ]),
       submit () {
-        this.$store.dispatch('getJWTToken', this.credentials).then(response => {
-          this.$router.push('/reviewer/')
-        }).catch(_ => {
-          this.error = this.$store.state.error
-        })
+        this.loading = true
+        this.getJWTToken(this.credentials).then(() => {
+          this.loading = false
+          this.getExamModule()
+          this.getUserRole()
+          this.getJWTTimeDelta()
+          this.$router.push('/student/')
+        }).catch(() => { this.loading = false })
       }
     }
   }