Select Guest User Login in Authentication methods and remember to press Finish
Press the config button to configure the fields asked from guest while logging in.
Add a new Guest User by going to Guestuser->View
Dont forget to save changes.
Username must be unique under the same site.
If you have a list of usernames and passwords along with required values, you can import it in the form of a csv file to spotipo.
Select your csv file and click submit.
Download sample csv file to get an idea about the synax and column names of the required csv file. Importing CSV file should have column names exactly same as in sample csv file. For duration types minutes, hours and days give values 1, 2 and 3 respectively.