Follow the steps
Step 1: After the user created his Cloud Account, he enters the "Charging Network“ settings.
Step 2: The customer selects "predefined".
Step 3: There the customer can choose his Central System from a list. All necessary fields are filled out automatically.
Step 4: The customer needs to fill in the User ID Tag. This is the UID of a charging card.
Step 5: Setup only has to be done one time
NOTE: The User Tag Identifier is the UID, this should be the UID the customer wants to use to registrate the charging sessions.