csv-library-website/library/templates/user_authorization.html

{% block auth %}
<div id="auth_buttons">
  {% if not current_user.is_authenticated %}
  <div class="auth">
    <a href="/login">
      <svg class="feather">
        <use href="{{ url_for('static', filename='icons/users-feather-sprite.svg')+ '#log-in'}}" />
      </svg>
      <span>Sign in</span>
    </a>
  </div>
  <div class="auth">
    <a href="/register">
      <svg class="feather">
        <use href="{{ url_for('static', filename='icons/users-feather-sprite.svg') + '#user-plus'}}" />
      </svg>
      <span>Register</span>
    </a>
  </div>
  {% else %}
  <div class="auth">
    <a href="/logout">
      <svg class="feather">
        <use href="{{ url_for('static', filename='icons/users-feather-sprite.svg') + '#log-out'}}" />
      </svg>
      <span>Sign out</span>
    </a>
  </div>
  {% endif %}
</div>
{% endblock auth %}