@Anonymous Welcome to Microsoft Q&A and Thank you for posting your question.
DMA does not move logins to Azure SQL DB. Move SQL logins from the SQL Server source to Azure SQL Database by using Database Migration Service in offline mode. Use the Selected logins pane in the Migration Wizard to migrate logins to your target SQL database.
You can also migrate Windows users and groups via Database Migration Service by enabling the corresponding toggle on the Database Migration Service Configuration page.
Alternatively, you can use the PowerShell utility specially designed by Microsoft data migration architects. The utility uses PowerShell to create a Transact-SQL (T-SQL) script to re-create logins and select database users from the source to the target.
The PowerShell utility automatically maps Windows Server Active Directory accounts to Azure Active Directory (Azure AD) accounts, and it can do a UPN lookup for each login against the source Active Directory instance. The utility scripts custom server and database roles, along with role membership and user permissions. Contained databases are not yet supported, and only a subset of possible SQL Server permissions are scripted. Thanks