in my Civicrm 5.31 on Wordpress 5.5 I'm trying to retrieve contribution data via Rest API, using the apiExplorer I get the code:
wp-content/plugins/civicrm/civicrm/extern/rest.php?entity=Contribution&action=get&api_key=userkey&key=sitekey&json={"sequential":1,"return":"contact_id,contribution_source,total_amount,fee_amount,trxn_id,invoice_number","receive_date":{">":"01/01/2021"}}
but if I try to add the display_name it doesn't work. I try: contact_id.display_name and display_name