How to get query string parameters? OB/BB

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How do you find the query string parameters and parse it?

 

I want to capture a some shits but it has in the url a query string parameters for example "123456" when i search for that in the captured traffic before, i cant not find it so how does the query string paramter get generated and where to search for?

 

url looks like this:

 

https://"site url"/api/userauth/type/users/?ts=