creating an output variable azure devops from the Azure SQL InlineSqlTask task

Question

 YAML content :

- task: SqlAzureDacpacDeployment@1
  displayName: 'Azure SQL InlineSqlTask'
  inputs:
    azureSubscription: 'Service Connection'
    AuthenticationType: servicePrincipal
    ServerName: 'xxx.database.windows.net'
    DatabaseName: 'xxx-Dev'
    deployType: InlineSqlTask
    SqlInline: |
     select name as username,
                  create_date,
                  modify_date,
                  type_desc,
                  authentication_type_desc as authentication_type
                  from sys.database_principals where type_desc = 'EXTERNAL_USER'

I want to have the output of this t-SQL command stored in a variable. Can someone tell me how to do it?