Fix login

pages/index.vue

@@ -11,7 +11,10 @@
     </v-card-text>
 
     <v-card-actions>
-      <v-btn :to="localePath('/researchStudies')">
+      <v-btn v-if=isLoggedIn :to="localePath('/researchStudies')">
+        {{ $t('page.landing.startButton') }}
+      </v-btn>
+      <v-btn v-else href="http://localhost:8000/auth/login/?next=/researchStudies">
         {{ $t('page.landing.startButton') }}
       </v-btn>
     </v-card-actions>
@@ -25,6 +28,7 @@ export default {
   data() {
     return {
       seed: +new Date(),
+      isLoggedIn: this.$store.getters['authorisation/isUser'],
     }
   },
   head() {
@@ -35,7 +39,7 @@ export default {
     }
   },
   mounted(){
-    if (this.$store.getters['authorisation/isUser']) {
+    if (this.isLoggedIn) {
       this.$router.push(this.localePath('/researchStudies'))
     }
   },