The login page already allows some customization with custom CSS and icon.
Maybe it would also be good to have a more standarized option where you can define some text, for example:
This Kibana environment is managed by X, in case of questions or issues please contact Y
Or reserve a bit of space in the UI of the login page where the user can place his own custom text via kibana.yml?
Maybe you can already do this with custom CSS/Javascript.
But I am a bit hesitant to go down this road to prevent issues with future release.
Use case:
Many users, links being shared, new potential users in company are unsure who to contact. Get requests via via for all sorts of people. Would like to standarize requests towards 1 generic mailbox.
Yes YAML supports multi line, and this string will be a HTML snippet. So you can put anything there, new line would be , but you could even put an iframe there if you want.