How to reset the password of Roundcube

[novara]

After I installed Roundcube, when I go to the email URL, it asks for username and pasword for Roundcube itself.

I can't find these and email credentials don't work.
Is there a way to reset the username and password of Roundcube and if yes, how?

Following is an image of how it looks:

https://drive.google.com/file/d/1gjIQjk8lWGjaMHCAakcWu5f7anM92uK1/view?usp=sharing

[SKaero]

Roundcube authenticates to the IMAP server so you would use the login details for your IMAP server. If you want to change the password you would need to do that on your mail server.