🛠️Setup Instructions (Public App Authentication)
Step 1: Register Your Public App in HubSpot

Log in to your HubSpot Developer Account.

Navigate to Apps → Public Apps in the Developer Portal.

Click Create an App and enter the required details, such as app name and description.

In the Auth Settings, set the Redirect URL where users will be redirected after authentication.

Under Scopes, select the necessary permissions (e.g., Contacts, Deals, Companies) based on the CRM data you need access to.

Step 2: Get Client ID & Client Secret

After creating the app, go to the Auth Settings.

Copy the Client ID and Client Secret—these will be required for API authentication.

Step 3: Authenticate Users via OAuth 2.0

To allow users to connect their HubSpot accounts, use the Redirect to HubSpot OAuth (Testing) action.

Provide the following parameters:
Client ID
Redirect URL
List of Scopes (space-separated format)

This action will redirect users to HubSpot’s authorization page, where they can grant access to your app.

Once authorized, HubSpot will redirect them back to the specified Redirect URL with an Authorization Code.

Step 4: Exchange Authorization Code for an Access Token

Use the Get Access Token action to exchange the received Authorization Code for an Access Token.

The Access Token allows API calls on behalf of the authenticated user.

Save this token securely for making further API requests.

Step 5: Manage Token Expiry & Refresh Process

Use the Refresh Token action to generate a new access token when the current one expires.

If user access needs to be revoked, use the Delete A Refresh Token action.

Final Step: Your HubSpot Express Plugin is Ready! 🚀

Your integration is now complete. Users can securely connect their HubSpot accounts, retrieve CRM data, and automate workflows. 🎉