# Mailchimp authentication

> Depending on the authentication type you select, you need one of
the following credentials:

## Prerequisites

Depending on the authentication type you select, you need one of
the following credentials:

* OAuth 2.0 Authorization code: the email address and password associated with your Mailchimp account.
* Bring your own OAuth 2.0 app: client ID and client secret.

For creating a private OAuth 2.0 app, follow the steps described in the Mailchimp [documentation](https://mailchimp.com/developer/marketing/guides/access-user-data-oauth-2/#register-your-application).

If you encounter any issues while trying to log in, visit the [Mailchimp Help section](https://mailchimp.com/help/i-cant-log-in/).

:::note
When registering your OAuth application in Mailchimp, make sure to set the [callback URL](connections#callback-url) to the value displayed on the connection creation page, for example `https://cloud.uipath.com/provisioning_/callback` for Automation Cloud.
:::

## Add the Mailchimp connection

To create a connection to your Mailchimp instance, you need to perform the following steps:

1. Select Orchestrator from the product launcher.
2. Select a folder, and then navigate to the **Connections** tab.
3. Select **Add connection**.
4. To open the connection creation page, select the connector from the list. You can use the search bar to find the connector.
5. You can choose between two authentication types: OAuth 2.0 Authorization code or Bring your own OAuth 2.0 app.
6. Enter the required credentials and select **Connect**.

   For any secret-type field, you can select the menu next to the field and choose **Use credential asset** to reference an Orchestrator credential asset linked to an external vault instead of entering the value directly. For more information, see [Use credential assets for connections](credential-store-connections.md).