Catalyst 9300L- error login WebGui

[cosimo.cantatore]

Good morning, with the switch model attached you cannot access via Web ui con default credentials. Can anyone show me credentials via the web? Telnet passwords don't work

[balaji.bandi]

here is the default gui access (until you have changed after setup)

Enter the Day 0 username webui and password serial number of the switch. Note that the serial number is case sensitive.

here is the reference guide :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/hardware/install/b_c9300_hig/b_c9300_hig_chapter_01000.html

Try above method, also post from console show running

[cosimo.cantatore]

I had already tried this document but it doesn't work. incorrect credentials