nginx proxy for jdbc connection with modifying property

[gubtiny]

I am using nginx server for jdbc connection for snowflake db and it is
working fine, currently authentication is based on password. But due to
recent changes I need to enable keypair based authenticate using private
key.

Front end application does not support the required[1] property for keypair
based, so I am thinking of sending the private key in the password field and
at nginx-proxy add the property "privatekey" based on the password field.

Is this possible at nginx side? I could not get much info from nginx config
so checking here, I really appreciate if any suggestions

[1]
https://docs.snowflake.com/en/user-guide/jdbc-configure.html#privatekey-property-in-connection-properties

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,295600,295600#msg-295600