Dynamic range of dates for REST

My current pipeline works with pipeline parameters defining the range of dates

However my goal is to automatize this for each month. My idea is to schedule a task for the first of every month and I would like to dynamically set date2 as Today minus one day in yyyy-mm-dd format (no time) and date 1 as Today minus one month. So that if Today is October first, then date 2 is 2023-09-30 and date 1 is 2023-09-01.

To accomplish this, I am trying to utilize the query parameters section in the REST Get snap. However, I am not able to properly create the functions. As I am not familiar with the snap functions and the documentation is not very explicit on how to combine multiple functions. I would appreciate any help. 

#RestGet #Dates