How can i change my API Login ID and Transaction Key?

I need to update my API login id and transaction key. What's the best way to do this?

Which API Login ID and Transaction Key you're referring?

Are you referring to the Jotform API Key? If yes, you can recreate it on your account here http://www.jotform.com/myaccount/api.

If you are referring to anything else, like Paypal API login ID then you have to login to your Paypal account to update it. Otherwise, please let us know if the aforementioned isn't what you mean. Thanks!