To Obtain Credentials you first must create an account you can sign up here

https://register.gfsdeliver.com

Once registered you will be sent a link where you must verify your email and them a final email will be sent with the credentials required.

The credentials are in two parts which are listed below

Management portal

Email address – The email address you entered and received the welcome message
Password – this is the one you choose on the signup form

API Access

Client ID – This is your unique ID
Client Secret – Please make a note of this as we cannot obtain this after it has been sent to you.