React Advanced Form - Submit

RegistrationForm.jsx

import React from 'react';
import { Form } from 'react-advanced-form';
import { Input } from '...';

export default class RegistrationForm extends React.Component {
  registerUser = ({ serialized, fields, form }) => {
    return fetch('https://backend.dev/user', {
      method: 'POST',
      body: JSON.stringify(serialized)
    });
  }
  
  render() {
    return (
      <Form action={this.registerUser}>
        <Input
          name="userEmail"
          type="email"
          required />
        <Input
          name="userPassword"
          type="password"
          required />
      </Form>
    );
  }
}