type:'login' is ignored on every request

[pabgn]

Although I have configured everything as specified in the installation guide, I keep sending cURLs to my server with the specified type:'login' and the data needed, but it just tries to store a new user, ignoring I want to login. I don't know whether I need to set any other configuration in my resources.py.
Here it is my cURL:
curl --dump-header -H "Accept: application/json" -H "Content-Type: application/json" -X POST --data '{"type":"login", "username":"pablo", "password":"pass"}' 'http://localhost/api/v1/user/?username=root&api_key=9a7f7c7d5489dddcbd6700fa6ab5345f681142b5&format=json'

Thanks!