Executing POST request using content type of x-www-form-urlencoded

[AbdAlKarimBalousha]

I have an API that contains a request that uses x-www-form-urlencoded as body data type .. i noticed that when i use set_body_data the client proxy automaticly set the content-type to json so that won't work .. so i had to remove the request body before the execute and use the mo_http_client to set the custom content type and set_form_fields but that also didn't work .. any ideas how to send POST request with x-www-form-urlencoded data using client_proxy ?

data(lo_request) = mo_http_client->request.

lo_request->set_content_type( 'application/x-www-form-urlencoded' ).

lo_request->set_form_fields( value #( ( name = 'grant_type' value = 'password' ) ) ).

mo_client_proxy->create_resource( zaf_if_types=>gcs_resource_names-pets
)->create_request( /iwbep/if_v4_rest_types=>gcs_http_method-post
)->execute()