To see the usage by user statistics in your Azure DevOps instance, follow the below steps
Step 1: Click on Organization Settings
Step 2: Go to Usage
Step 3: Select Usage by User on the left
Step 4: As soon as you select the option, you will be able to see which user has used and also you have got different filters to see whether they have accessed it using Web Platform or API and also you can see which command they have used
