Api tester help

I would like to know what i need put here? Link of image to use the api tester , because now i getting the white when i send information, and i’m not getting response.



And “redirect api” for where?



Thank you so much

I would like to know what i need put here? Link of image to use the api tester , because now i getting the white when i send information, and i’m not getting response.

And “redirect api” for where?

Thank you so much