This end point uses Basic Auth, which requires you to base64 encode your username and password (separated by a colon) and pass that in the Authorization header. The example below shows how it should appear.
Field Parameter
Value
Required
Field Values or Constraints
merchantID
123456
Required
6 All Numeric
integratorID
xYzAbC123
Required
4 / 30 Alphanumeric, space and dash
trxID
123456
Required
4 / 20 Alphanumeric, a-z, A-Z, 0-9 - (dash) (Must be Unique for 2 years)
GET https://cce.cashline.certegy.com/v1/user/login?integratorID={integratorID}&merchantID={merchantID}&trxID={trxID}
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=