I need assistance with a payment form and integration with Authorize.net

I have spoken with our payment processor and Authorize.net and they have provided me with the API required for integration. However, it is requesting a transaction key which they said you could provide as it is embed in the application. Can you please help me with this?

Thank you for contacting us. The API Login ID and Transaction Key is something that is provided by Authorize.net.

Please follow this guide from Authorize.net support: https://support.authorize.net/s/article/How-do-I-obtain-my-API-Login-ID-and-Transaction-Key