Installing themes on wordpress requires FTP/SSH credentials

I’m asked to enter in FTP/SSH credentials for installing themes on Wordpress. I’ve installed the wordpress with nginx and SSH key, and I tried copying and pasting the private and public keys to the input boxes, but that didn’t work.

I’m using the root user and changed ownership of the directory /var/www/html.

---

Installing Theme:

Connection Information

To perform the requested action, WordPress needs to access your web server. Please enter your FTP or SSH credentials to proceed. If you do not remember your credentials, you should contact your web host.

Hostname FTP/SSH Username FTP/SSH Password This password will not be stored on the server.

Connection Type FTP FTPS (SSL) SSH2

Authentication Keys Public Key: Private Key:

Enter the location on the server where the public and private keys are located. If a passphrase is needed, enter that in the password field above.