webdav with 2-step verification on iOS

I am using recommended WebDav apps for iphone webdav access. Both apps require that I enter password every time I browse directories.

For example :

login to server ->enter username/(password+totp)

Click Home folder ->enter username/(password+totp)

Click another folder under Home -> enter username/(password+totp)

Is there an app password or way for app to remember login for the session opened?