[Vuejs]-User input from form not posting to database? (axios ,mongodb, vue)

<template>
    <div>

        <h1>Registration</h1>

        <p>First name: </p>

        <b-form-input v-model="user.firstname">

        </b-form-input>

        <p>Last name: </p>

        <b-form-input v-model="user.lastname">

        </b-form-input>

        <p>Email: </p>

        <b-form-input v-model="user.email">

        </b-form-input>

        <p>Password: </p>

        <b-form-input v-model="user.password">

        </b-form-input>

        <br>

        <button v-on:click="submitNew">Submit</button>

    </div>
</template>

<script>
import UserService from "../UserService";

export default {
    name: "UserEdit",
    data() {
        return {
            editUsers: this.$route.query.user,
            editStatus: "",
            user: {}
        }
    },
    methods: {
        submitNew() {
            try {
                this.user = UserService.addUsers(this.user);
            } catch (err) {
                this.error = err.message;
            }
            this.cancel();
        }
    },
    watch: {
        $route: "updateRouter"
    }
}
</script>