This will be dependent on the app you wish to deploy.
Kindly navigate to the ‘Apps’ tab and click on the desired app. The App details will appear and click on the gear icon at the top right corner. Choose the ‘App Configuration’ from the drop-down list. On enabling the ‘Update App Configuration’ option, an option to upload an XML file will appear. An option to download a sample XML file will also be found alongside.
The login credentials for the app can be given through this XML file. But this is dependant on whether the app allows this feature.