Dashboard multiline text input card

https://github.com/faeibson/lovelace-multiline-text-input-card

following the sheet to try and set this up and I have what might be a dumb question, but here goes.
in the examples section the first line is
“Don’t forget to add your input_text or var entity in your configuration.yaml! ;)”
I have no idea what this means (yes, I’m still new to HA)
edit: I know what configuration.yaml is and can edit it, I just don’t know where the aforemention things would go and syntax for them.

Probably it was about “add the same input_text entity before testing my examples”.
Means - you need to have input_text entity - which is obvious))

if it’s obvious could you point me in the direction, because it’s not obvious to me. There is no “put your input_text entity here” section.

Thanks for making me look even more stupid.

This custom card works with an input_text entity.
To use the card - you need to have an input_text entity.
You can create an input_text entity from a Helpers page.
See docs about input_text helper on the HA site.

I’m so glad you asked this question. I’m also struggling to add this multiline card to my dashboard. I do have input_text created through helper and I have the entity name but my dashboard is not recognizing this card type. any idea?

What do you mean excactly?

Do you have HACS fully installed? That is required if you are trying to use

type: 'custom:multiline-entity-card'