Change models, new migrations, fix front and make tests work

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/components/NavBar.vue

@@ -58,7 +58,7 @@
         </v-card-actions>
       </v-card>
     </v-menu>
-    <v-btn flat @click="$router.push({name: 'Account', params: {'id': getUser().account.id}})" v-if="$store.state.isLogged && getUser()">{{ getUser().username }}</v-btn>
+    <v-btn flat @click="$router.push({name: 'Account', params: {'id': getUser().account.id}})" v-if="$store.state.user">{{ this.displayed_name }}</v-btn>
   </v-toolbar>
 </template>
 
@@ -95,6 +95,11 @@
         }
       }
     },
+    computed: {
+      displayed_name: function() {
+        return this.$store.state.user.account.display_name === null ? this.$store.state.user.account.username : this.$store.state.user.account.display_name
+      },
+    },
     methods: {
       getUser() {
         return this.$store.state.user === undefined ? false : this.$store.state.user;