Error code 400 in ParallelDots API

I'm using ParallelDots API(link2api). However, the result return:

{
"code": 400,
"message": "Parameter `API Key` or `TEXT` is either not specified or set to null."
}

I pass the parameters like this:

ParallelDots's Parameter

image

I'm a newbie to this and Can you show me how to solve this problem?

Answers