The following sample should be used in CAWI surveys using "Participants List" when each Participant is required to Login at the first question of the survey.
Participant Lists are explained here: How to Setup & Manage CAWI Participant List
Each Participant will have a unique "User Name" and "Password" in the "Participants List" Excel.
The Participant would not be able to continue with the survey if he failed to Login.
This is implemented using Validation Rules at the first question in the survey(Q_Login).
The Participant should insert his "User Name" and "Password" based on the Participants List Excel:
* Make sure to update the "Email_Address" column as needed: