求助:vue录播课程,注册页面写好后,报错

截图


代码-components-SignUp

<template>
    <div class="sign-up">
        <h1>注册</h1>
        <v-text-field v-model="username"  label="用户名"></v-text-field>
        <v-text-field  v-model="password" label="密码"  type="password"></v-text-field>
        <v-text-field v-model="email" label="邮箱"></v-text-field>
        <v-btn color="primary" @click="register()" >注册</v-btn>
        <v-btn color="primary" @click="SignIn()" text>去登录</v-btn>
        
    </div>
</template>
<script>
export default{
    data(){
        return{username:'',
        password:"",
        email:""

        }
    },
    methods:{
        SignIn(){
            this.$router.push({name:"SignIn"})
        },
        register(){
            let  post_data={
                username: this.username,
                password: this.password,
                email: this.email
            }
            this.$api.use.SignUp(post_data).then(res=>{
                console.log(res)
            })
        }

    }

}
</script>

<style scoped>
.sign-up{
    width:"500px";
    margin: 0 auto;
    text-align: center;
}
</style>

router-index.js

import Vue from 'vue'
import VueRouter from 'vue-router'
import SignIn from '../components/SignIn.vue'
import SignUp from '../components/SignUp.vue'

Vue.use(VueRouter)

const routes = [
  // {
  //   path: '/', 
  //   name: 'Home',
  //   component: Home
  // },
  // {
  //   path: '/about',
  //   name: 'About',
  //   // route level code-splitting
  //   // this generates a separate chunk (about.[hash].js) for this route
  //   // which is lazy-loaded when the route is visited.
  //   component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  // }
  {
    path:"/",
    name:"SignIn",
    component: SignIn
  },
  {
    path:"/sign-up",
    name:"SignUp",
    component: SignUp
  }
]

const router = new VueRouter({
  routes
})

export default router

学院提供的后端接口,userName中的n是大写,所以register()方法中的也要大写

let post_data = {
    userName : this.username,
    password : this.password,
    email : this.email,
}

同理,登陆方法传参也要大写