How do I add a service that isn't available as a connection with trigger function?

How do I add a service that isn't available as a connection with trigger function?

To add a service that isn't available as a connection:

  1. Click Custom Service .
  2. Type a name for your service in the  Service Name  field.
  3. Select an authentication type in the  Authentication Type  dropdown.
  4. Select the parameter type in the  Param Type  dropdown.
  5. Type a connection name in the  Connection Name  field.
  6. Select the checkbox that follows to use the credentials of the logged in user.
  7. Click  Create and Connect.
    Select a custom service