Need of a Delphi Developer who can Integrate our legacy delphi desktop application with QuickBooks Online.

We need a Delphi developer who can create a connection between our legacy Delphi Desktop Application with QuickBooks online, currently, Our application is connected with QuickBooks Desktop Pro, but we need it to migrate it to QuickBooks Online, that to without requiring Authorization page again and again. Delphi version is Berlin 10.1.2.