curl --request POST \
     --url 'https://api.iugu.com/v1/emails?api_token=your_api_token' \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data @- <<EOF
{
  "active": true,
  "identifier": "invoice_reminder",
  "template": "<div style=max-width:640px; position: relative; padding: 20px 20px 20px 20px;>\\n\\n  <!-- LOGO  -->\\n  {% if invoice.custom_logo %}\\n    <img src={{ invoice.custom_logo }}, style=max-width: 120px; max-height: 60px; text-align: center;, alt={{ invoice.account_name }} />\\n  {% endif %}\\n\\n  <!-- INVOICE INFORMATION -->\\n  {% if invoice.customer_ref %}\\n    {% assign name = invoice.customer_ref %}\\n  {% else %}\\n    {% assign name = invoice.email %}\\n  {% endif %}\\n  <div style=font-size: 20px; color: #5274FF; font-weight: bolder; margin-top: 20px>{{ 'emails.invoice_reminder_to' | t }} {{ name }}</div>\\n\\n  {% assign date = invoice.due_date | localized_date_short %}\\n  <div style=margin-top: 20px>{{ 'emails.automatic_alert_remind_you_of_an_invoice' | t: date: date, account_name: invoice.account_name }}</div>\\n\\n  <div style=margin-top: 20px;>{{ 'emails.buy_time' | t }} <strong><a href={{ invoice.to_secure_url }}>{{ 'emails.click_here' | t }}* </strong></a>{{'emails.and_see_the_options'| t}}</div>\\n\\n  <table cellspacing=0 cellpadding=2 style=width: 100%; margin-top: 20px>\\n    <thead style=text-align: left; font-size: 14px; color: #9A9A9A>\\n      <tr>\\n        <th style=border-bottom: 2px; width: 48%>{{ 'transaction' | t | upcase }}</th>\\n        <th style=border-bottom: 2px>#{{ invoice.id }}</th>\\n      </tr>\\n    </thead>\\n    <tbody style=font-size: 12px>\\n      <tr>\\n        <td style=padding-top: 20px></td>\\n      </tr>\\n      <tr>\\n        <td style=font-size: 11px><strong>{{ 'emails.generated_in' | t | upcase }}</strong></td>\\n        <td>{{ invoice.created_at | date: '%d/%m/%Y' }}</td>\\n      </tr>\\n      <tr>\\n        <td style=padding-top: 20px></td>\\n      </tr>\\n      <tr>\\n        <td style=font-size: 11px><strong>{{ 'emails.due_date' | t | upcase }}</strong></td>\\n        <td>{{ invoice.due_date | date: '%d/%m/%Y' }}</td>\\n      </tr>\\n      <tr>\\n        <td style=padding-top: 20px></td>\\n      </tr>\\n      {% if name == invoice.email %}\\n        {% assign client = 'email' %}\\n      {% else %}\\n        {% assign client = 'name' %}\\n      {% endif %}\\n      <tr>\\n        <td style=font-size: 11px><strong>{{ client | t | upcase }}</strong></td>\\n        <td>{{ name }}</td>\\n      </tr>\\n    </tbody>\\n  </table>\\n\\n  <!-- SUMMARY -->\\n  {% comment %} <div style=font-size: 15px; margin-top: 20px; color: #808080>{{ 'emails.summary' | t | upcase }}</div> {% endcomment %}\\n\\n  <table cellspacing=0 cellpadding=2 style=width: 100%; text-align: right; margin-top: 10px>\\n    <thead style=text-align: right; font-size: 10px; color: #9A9A9A>\\n      <tr style=background-color: #9a9a9a>\\n        <th style=text-align: left; color: #3E4444>{{ 'emails.description' | t | upcase }}</th>\\n        <th style=text-align: left; color: #3E4444>{{ 'emails.quantity' | t | upcase | replace: ':', '' }}</th>\\n        <th style=text-align: left; color: #3E4444>{{ 'emails.value' | t | upcase }}<span>(R$)</span></th>\\n        <th style=text-align: left; color: #3E4444>{{ 'total' | t | upcase }}<span>(R$)</span></th>\\n      </tr>\\n    <tbody style=font-size: 12px>\\n      {% for item in invoice.items %}\\n        <tr>\\n          <td style=border-top: 1px solid #60AB30; text-align: left>{{ item.description }}</td>\\n          <td style=border-top: 1px solid #60AB30; text-align: left>{{ item.quantity }}</td>\\n          <td style=border-top: 1px solid #60AB30; text-align: left>{{ item.price }}</td>\\n          <td style=border-top: 1px solid #60AB30; text-align: left>{{ item.total }}</td>\\n        </tr>\\n      {% endfor %}\\n      <tr style=color: #3E4444>\\n        <td style=border-top: 2px solid #60AB30></td>\\n        <td style=border-top: 2px solid #60AB30></td>\\n        <td style=border-top: 2px solid #60AB30></td>\\n        <td style=border-top: 2px solid #60AB30></td>\\n      </tr>\\n    </tbody>\\n  </table>\\n\\n  <a href={{ invoice.to_secure_url }} style=text-decoration:none!important>\\n    <p style=text-align: center; border-radius: 11px; padding: 0px 20px; line-height: 45px; background: #5274FF; color: #fff; margin: 0 auto; width: 25%; font-size: 20px; margin-top: 15px; target=_blank>{{ 'emails.pay_the_invoice' | t }}</p>\\n  </a>\\n\\n  <div style=font-size: 11px; margin-top: 20px>\\n    {{ 'emails.if_the_button_does_not_work' | t }}:\\n    <br/>\\n    <a href={{ invoice.to_secure_url }}><p>{{ invoice.to_secure_url }}</p></a>\\n  </div>\\n\\n  <div>\\n    <p>{{'emails.bank_slip_partial_payment.greetings' | t }}<br><span><strong>{{'emails.iugu_team' | t }}.</strong></span></p>\\n  </div>\\n\\n  <div style=margin-top: 30px; border-top: 2px solid #ccc; padding-top: 10px>\\n    <div style=font-size: 12px>{{ 'emails.doubts' | t }} <a href=https://support.iugu.com/hc/pt-br>{{ 'emails.support' | t }}</a></div>\\n  </div>\\n  <hr style=border-top: 2px solid #ccc>\\n\\n  <p>{{'emails.automatic_email'| t }}</p>\\n</div>\\n",
  "subject": "{{ invoice.account_name }} - {{ 'emails.invoice_reminder' | t }}: {{ invoice.to_secure_id | split: '-' | last }}"
}
EOF

curl --request PUT \
     --url 'https://api.iugu.com/v1/emails/AB96E518FD9F48439D65B07A12E8D594?api_token=your_api_token' \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
     {
     	"active":"false"
     }
     '