Basic API example

Hope everything is doing well! I'm trying to get a basic report using the API. Looking at the "https://support.workfront.com/hc/en-us/articles/115003574147-API-Basics">documentation I found the following example: GET /attask/api/v9.0/hour/report?project:name_1_GroupBy=true&hours_AggFunc=sum where, (here I am supposing, please reply if this is correct) project:name_1_ I supposed here we are adding the name of the project. Is here an error, the last underscore should be and '&'? GroupBy=true Here we are enabling the group by, but grouped by what? hours_AggFunc=sum Finally, a parameter to sum Best Regards! Ruben Jimenez "Praise the Sun"