The documentation for paypal adapative api requires the developer to send 6 headers amongst which there are:
X-PAYPAL-SECURITY-USERID : Sandbox-Caller-User-Id
X-PAYPAL-SECURITY-PASSWORD : Sandbox-Caller-Password
X-PAYPAL-SECURITY-SIGNATURE : Sandbox-Caller-Security-Signature
The trouble is I don't know where to find the USERID, PASSWORD and SIGNATURE
In the below screenshot that I took from the Paypal Sandbox Business Account, there is no such thing as USERID, PASSWORD and SIGNATURE. Instead I have Sandbox account, Endpoint, Client ID and Secret.
Screenshot: https://dl.dropboxusercontent.com/u/6599473/Capture.PNG
So which is which? What is the userid? What is the password? and what is the signature?