Redirect to profile creation when user has no identities

Also load persons by ID instead of preferred_username

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

js/src/views/User/Register.vue

@@ -135,7 +135,7 @@ export default class Register extends Vue {
 
       this.validationSent = true;
 
-      this.$router.push({
+      await this.$router.push({
         name: RouteName.REGISTER_PROFILE,
         params: { email: this.credentials.email },
       });