Altra conversione in Typescript , partendo da un progetto di esempio funzionante...

src/views/AuthSuccess.vue

@@ -0,0 +1,31 @@
+<template>
+  <div>
+    <h1>Signup succeeded</h1>
+    <button @click='logOut'>Log out</button>
+    <hr>
+    <img :src="photo" style='height: 120px'>
+    <br>
+    <p>{{name}}</p>
+    <p>{{email}}</p>
+    <p>{{userId}}</p>
+    <hr>
+    <pre>{{user}}</pre>
+  </div>
+</template>
+
+<script>
+  export default {
+    data () {
+      return {
+        photo: '',
+        userId: '',
+        name: '',
+        email: '',
+        user: {}
+      }
+    },
+    created () {
+
+    },
+  }
+</script>