I created an Item as follows and it got created successfully
$query = 'mutation ($myItemName: String!, $columnVals: JSON!) { create_item (board_id:641098600, item_name:$myItemName, column_values:$columnVals) { id } }';
$vars = ['myItemName' => "My Personal Task",
'columnVals' => json_encode([
'status' => ['label' => 'Done'],
'date4' => ['date' => '1993-08-27'],
'firstname1' => ['firstname' => 'Tony'],
'lastname1' => ['lastname' => 'Paul'],
])];
Now I want to query the items that I created as the code below to get item name, firstname, lastname etc.
$query = ' query{ items { id name firstname lastname } }';
Here is the error it displays
{"errors":[{"message":"Field 'firstname' doesn't exist on type 'Item'","locations":[{"line":1,"column":26}],"fields":["query","items","firstname"]},{"message":"Field 'lastname' doesn't exist on type 'Item'","locations":[{"line":1,"column":36}],"fields":["query","items","lastname"]}],"account_id":66xxxx}