In CFA when we refer to a Requester we are referring to the part of your build process that would be running npm publish this is typically a CI provider such as Circle CI, Travis or Azure Pipelines. It is the service that will actually be "requesting" the OTP from CFA.
Once you added your repository as a project in CFA you should be able to choose from any of our supported Requesters to configure. For more information on each Requester, what they validate and how to configure them please check the individual Requester pages.
I want to use CI provider X but there is not a requester for it?
Check out our Contributing FAQ for more information on how to add a new requester. We're always open to new pull requests.