I have value but I don't have the key/id. Need suggestions! (Sheets to Monday)

Hi,

I have a column in Google Sheets and in that column I have string value,

But monday.com API wants me to send the key with that value.

And I don’t have any key in Google Sheets,

The only way I can get the keys is the values of the fields.

What can I do to have the id of my values from monday and send to monday again for all rows?

Thank you!