Acquirer registration

An Acquirer can create Payment Facilitators and Merchants.

Endpoints

Method	Path	Description	Who can invoke it
`POST`	`/onboarding/acquirers`	Register an acquirer.	Admin, Gateway.
`GET`	`/onboarding/acquirers/{code}`	Retrieve an acquirer.	Admin, Gateway, Acquirer.
`PUT`	`/onboarding/acquirers/{code}`	Update an acquirer.	Admin, Gateway.

OAuth credential generation is configurable with generate_credentials: "true" or "false".

When generated, the client_id and client_secret are displayed only once during registration. Store them securely.

Review the operations for registering and managing Payment Facilitators.