Nuxt.js(SSR)でfunctionがないとされてしまう。

前提・実現したいこと

fromをsubmitしたときにregister()に飛ぶようにしたいです。
現状では

[Vue warn]: Property or method "register" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property

となってしまいます。

該当のソースコード

nuxt
1<template>
2  <div class="wapper col-md-6">
3    <div class="border mt-5 p-4 bg-light">
4        <form @submit.prevent="register">
5            <div class="form-group">
6                <label for="exampleInputEmail1">ユーザ名</label>
7                <input type="name" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
8                <small class="form-text text-danger" v-if="errors.name">{{errors.name[0]}}</small>
9            </div>
10            <div class="form-group">
11                <label for="exampleInputEmail1">メールアドレス</label>
12                <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" placeholder="Enter email">
13                <small class="form-text text-danger" v-if="errors.email">{{errors.email[0]}}</small>
14            </div>
15            <div class="form-group">
16                <label for="exampleInputPassword1">パスワード</label>
17                <input type="password"  class="form-control" id="exampleInputPassword1" placeholder="Password">
18                <small class="form-text text-danger" v-if="errors.password">{{errors.password[0]}}</small>
19            </div>
20            <div class="form-group">
21                <label for="exampleInputPassword1">パスワード（確認用）</label>
22                <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
23            </div>
24            <button type="submit"  class="btn btn-primary">Submit</button>
25        </form>
26    </div>
27  </div>
28</template>
29<script>
30export default {
31    data(){
32        return {
33            form:{
34                name:"",
35                email:"",
36                password:"",
37                password_confirmation:''
38            }
39        }
40    },
41    methods: {
42        register(){
43            console.log('aa');
44        }
45    }   
46}