InterFace And WebApi.. NullReference Exception

Question

public interface ILoginManager

{

IEnumerable<HR_Login> GetLogins();

}

I have declared this methods in the interface and implemented in below class

 

class LoginManager : ILoginManager

{

private readonly ILoginRespository _loginRepository;

public LoginManager(ILoginRespository loginRepository)

{

_loginRepository = loginRepository;

}

public HR_Login Create(HR_Login login)

{

return _loginRepository.Create(login);

}

 Now i am trying to access the method in webapi

 

private readonly ILoginManager _loginManager;

public LoginController()

{

}

public LoginController(ILoginManager loginManager)

{

this. _loginManager = loginManager;

}

[HttpGet, Route("logins")]

public HttpResponseMessage Get()

{

return Request.CreateResponse(HttpStatusCode.OK, _loginManager.GetLogins());

}

 

 And when i complied this code... It is giving mr the Null Reference exception in the controller GET Method.