API for payment

Hello, i’m new to slim but unfortunately the web application I’m working is a slim framework. I have being trying to terminate (disconnect) a payment API, how do I go about it. I have tried all I could but the API is not yet disconnected.

I think we’re going to need more information. Is your Slim app the provider or consumer of the API you’re trying to disconnect? Probably going to be difficult for us to give an answer without seeing some code as what you are describing wouldn’t be part of the Slim core.

I need help please. I want to create an online payment api. Developers can use the API, so for that they have to create an account.
When creating the account, they will have an API ID, a secret key. They will use these two elements plus a token to use the application.
I do not know where to start.

Maybe with provider’s “how to” url?