retrofit interface

public interface RestServiceInterface {

    @Headers("Content-Type: application/x-www-form-urlencoded")
    @FormUrlEncoded
    @POST("users/authenticate")
    Call<LoginUser> userLogin(@Field("email") String email, @Field("password") String password);

    @Headers("Content-Type: application/x-www-form-urlencoded")
    @FormUrlEncoded
    @POST("users/register")
    Call<RegisterUser> userRegister(@Field("name") String name, @Field("email") String email, @Field("password") String password);

}