Web Service doesn't work with Postman

Hi

I am trying to use the web service. When I use the cURL statement, it works. But I use Postman, it doesnt work.

this works:
curl -i -d '{"name":"test2","email":"test@test.com","password":"test"}' http://URL/api/v1/users/login


But the same thing on Postman gives me this error:
{
"id": "api.user.login.blank_pwd.app_error",
"message": "Password field must not be blank",
"detailed_error": "",
"request_id": "6bspxjiejbdsuck7t1s5sfz65y",
"status_code": 403,
"is_oauth": false
}

Any clue? Thanks so much.