Generating Access Token
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In your HubSpot account, click the settings icon in the main navigation bar.
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In the left sidebar menu, navigate to Integrations > Private Apps.
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Click Create private app. On the Basic Info tab, configure the details of your app: Enter your app's name. Hover over the placeholder logo and click the upload icon to upload a square image that will serve as the logo for your app. Enter a description for your app.
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Click the Scopes tab. Select the Read or Write checkbox for each scope you want your private app to be able to access. You can also search for a specific scope using the Find a scope search bar.
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After you're done configuring your app, click Create app in the top right.
Finding List ID
Navigate to Contacts > Lists, hover over the list in the table, then click Details. In