Step 1: You need to have an Adobe ID, more information here: https://helpx.adobe.com/manage-account/using/create-update-adobe-id.html
Step 2: Share your Adobe ID with your Adobe Analytics Admin to grant access to you.
Optional: In case your Org uses Federated ID (details here), you may Step 1 and seek access directly.
Step 3: Make sure that your Admin provides you right access (to the Report Suites) to view the report you're looking for. Reference here.