First locate you API token which is your user credentials, learn where to find it here.
Your App token is the tracker token to which all your date are attributed. This is used as an identifier for your app and can be found by clicking the arrow below your app in the App tab.
Selecting Report will decide if you get data per event date (Standard) or if you get revenue data in an a cohort grouped on install date (Cohort).
The cohort report has an extra dimension called Period which for a 7 day Cohort window will have values between 0 and 6 where "0" has values for the install date and "6" is 6 days after the user installed the app. This is if you are using "Day" as Cohort Period, if you are using "Week" then the Period value "0" will mean the week the app was installed and "1" the week after.
Selecting Report Level will decide the granularity of the data. The "Creative" level will include all trackers while "Network" will only include the "Network Tracker" dimension.
Select the Additional Dimensions you are interested in. There are no limit on how many you can select and the metric totals will always be the same independent of your selection.
You can select the same attribution and timezone settings that you have in the Adjust dashboard, namely:
Attribution Type Read more here.
Reporting Timezone, the timezone you want to look at the data in.
Read about what data you get from Adjust here: