Adding Smart Payment Button
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I received my API certificate. Now I'm instructed to replace "sb" with my "Client ID" in the second row of the code. Question: What constitutes my "client ID?" Is it my user name?... my password?...my fingerprint code? What do I substitute "sb" with in the second line of the code that I'm going to paste in my website?
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I'm not expert but try this:
1. https://developer.paypal.com/developer/applications/ and log in with your PayPal business account credentials.
2. Navigate to the My Apps & Credentials tab on the left side menu and click the CREATE APP button in the REST API Apps section on the right.
3. Name the application (this does not impact the integration) and associate the sandbox test account.
4. Click the CREATE APP button.
5. The App will be created and the administrator can copy the Client ID and/or Client Secret from this page. Note: These values do not expire, but they can be disabled by an administrator if needed.
Kudos & Solved are greatly appreciated. 🙂

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Follow the instructions provided by @sharpiemarker above and this will create a REST application within your developer account, which you can then retrieve the "client_id" and "client_secret" from.
Respond on this thread with any updates in relation to the issue.
Thanks @sharpiemarker for responding here, nice detail too !
Thanks !
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