how do i obtain an application password

Application-specific passwords are usually associated with email accounts.

If you need to generate an App Specific Password, you’ll need to log-in to your Mail Providers account management webpage - using a web browser - and generate the Password from the appropriate account security page. Here are some examples:

Apple:

Sign in to apps with your Apple ID using app-specific passwords - Apple Support

Information about AOL’s App Specific Passwords can be found here:

https://help.aol.com/articles/allow-apps-that-use-less-secure-sign-in?guccounter=1

For Yahoo:

https://help.yahoo.com/kb/SLN27791.html

For Gmail:

https://support.google.com/mail/answer/185833?hl=en-GB

Microsoft:

https://support.microsoft.com/en-us/account-billing/using-app-passwords-with-apps-that-don-t-support-two-step-verification-5896ed9b-4263-e681-128a-a6f2979a7944

Do you mean an "application-specific password"? If so, start here:

Sign in to apps with your Apple ID using app-specific passwords - Apple Support