<script>
 export default {
     data(){
         return {
             form :{
                 email:null,
                 password:null
             }
         }
    },
    methods:{
        login(){
            User.login(this.form)
        }
    }
}
</script>

class User {
  login(data){
      axios.post('/api/auth/login',data)
          .then(res => this.responseAfterLogin(res))
          .catch(error => console.log(error.response.data))
  }
}
export default User = new User();

<script>
 export default {
     data(){
         return {
             form :{
                 email:null,
                 password:null
             }
         }
    },
    methods:{
        login(){
            axios.post('/api/auth/login',this.form)
            .then(res => console.log(res.data))
            .catch(error => console.log(error.response.data))
        }
    }
}
 </script>