# Embedded Signup for creating a WhatsApp Sender

Before creating the Embedded Signup (ES) sender, the end customer must connect their Meta account to the Multi-Partner Solution. This can be achieved via Sinch Build, or by following [instructions provided by Meta](https://developers.facebook.com/docs/whatsapp/solution-providers/multi-partner-solutions/#embedded-signup).

## Creating a sender

Prior to calling the create sender endpoint, ensure that you have your WhatsApp Business Account (WABA) ID (`wabaId`) and the phone number associated with the WABA (`phoneNumberId`) readily available. The remaining WABA details will be fetched automatically when calling the create sender endpoint.


```javascript
async function createSender() {
  const resp = await fetch(
    `https://provisioning.api.sinch.com/v1/projects/${PROJECT_ID}/whatsapp/senders`,
    {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        Authorization:
          'Basic ' +
          Buffer.from(ACCESS_KEY + ':' + ACCESS_SECRET).toString('base64'),
      },
      body: JSON.stringify({
        region: 'EU',
        metaLocalStorage: 'DE',
        wabaId: WABA_ID,
        phoneNumberId: PHONE_ID,
      }),
    }
  );

  const data = await resp.json();
  return data;
}
```

## Next steps

If the call is successful, the sender will move transition through various states. If there are no issues, the sender will eventually become `ACTIVE`. Once the sender is `ACTIVE`, you can create [templates](/docs/provisioning-api/getting-started/whatsapp/templates) for the sender.

### State transitions for ES Senders


```mermaid
stateDiagram-v2
    [*] --> IN_PROGRESS
    IN_PROGRESS --> ERROR
    IN_PROGRESS --> ACTIVE
    ACTIVE --> SUSPENDED
    SUSPENDED --> ACTIVE
    ACTIVE --> INACTIVE
    INACTIVE --> [*]

    note right of INACTIVE
        Will stay in INACTIVE for up to 30 days
    end note
```