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You also need to make sure that the postman has access to localhost.

i have issue to login with abantecart api where it keeps showing forbidden message. i have include the result in my attachment and im using postman to test the login api

query parameters are not correct. Replace the comma with &, and better fill in the key value parameters.
You should also make sure that access to api is enabled in the site settings and there is no ban on the server side.
Answer from api in json format

try this:
$that = $this->baseObject;
$that->load->model(....);
$that->model_......