Subscribe form shopify contact

<div class="modal-content">
    <span class="close1">&times;</span>
    <div class="popup-sub">
        <h4>SUBSCRIBE TO REEBOK FITNESS</h4>
        <p>Keep up to date with the latest news, promotional offers and fitness tips.</p>
        <p>By subscribing you accept that you have read and agree to our Terms & Conditions and Privacy Policy.</p>
        {%- form 'customer', id: 'footer-newsletter', class: 'Footer__Newsletter Form' -%}
        {%- if form.posted_successfully? -%}
        <p class="Form__Alert Alert Alert--success">You have been subscribed to our newsletter.</p>
        {%- else -%}
        {%- if form.errors -%}
        <p class="Form__Alert Alert Alert--error">{{ form.errors.messages['email'] }}</p>
        {%- endif -%}
        <input type="hidden" name="contact[tags]" value="newsletter">
        <input type="email" name="contact[email]" class="Form__Input" aria-label="Email Address" placeholder="Email Address" required>
        <button type="submit" class="Form__Submit Button Button--primary footerButton">Subscribe</button>
        {%- endif -%}
        {%- endform -%}
    </div>
</div>