Custom Implementation ASP.NET Identity -

i having little bit of problem implementing asp.net identity using repository pattern. when call usermanager.findasync(model.username, model.password) return nothing

please see account controller :

' post: /account/login <httppost> <allowanonymous> <validateantiforgerytoken> public async function login(model loginviewmodel, returnurl string) task(of actionresult)      if modelstate.isvalid         ' validate password         if usermanager nothing             usermanager = new usermanager(of applicationuser, guid)(new we.security.userstore(model.domainname))         end if         model.password = usermanager.passwordhasher.hashpassword(model.password)         dim appuser = await usermanager.findasync(model.username, model.password)         if appuser isnot nothing             await signinasync(appuser, model.rememberme)             return redirecttolocal(returnurl)         else             modelstate.addmodelerror("", "invalid username or password.")         end if     end if      ' if got far, failed, redisplay form     return view(model) end function  private function authenticationmanager() iauthenticationmanager     return httpcontext.getowincontext().authentication end function  private async function signinasync(user applicationuser, ispersistent boolean) task     authenticationmanager.signout(microsoft.aspnet.identity.defaultauthenticationtypes.externalcookie)     dim identity = await usermanager.createidentityasync(user, microsoft.aspnet.identity.defaultauthenticationtypes.applicationcookie)     authenticationmanager.signin(new authenticationproperties() {.ispersistent = ispersistent}, identity) end function  private function redirecttolocal(returnurl string) actionresult     if url.islocalurl(returnurl)         return redirect(returnurl)     else         return redirecttoaction("index", "home")     end if end function 

please see store code:

public class userstore    implements iuserstore(of applicationuser, guid)    implements iuserpasswordstore(of applicationuser, guid)  private repo genericrepository private _companyname string  public sub new(companyname string)     _companyname = companyname     repo = new genericrepository(companyname) end sub  private readonly property companyname string             return _companyname     end end property  public function createasync(user applicationuser) task implements iuserstore(of applicationuser, guid).createasync     throw new notimplementedexception end function  public function deleteasync(user applicationuser) task implements iuserstore(of applicationuser, guid).deleteasync     throw new notimplementedexception end function  public function findbyidasync(userid guid) task(of applicationuser) implements iuserstore(of applicationuser, guid).findbyidasync     dim user user = repo.getsingleordefault(of user)(userid)     dim appuser applicationuser = nothing     if user isnot nothing         appuser = new applicationuser(user.id) {.username = user.username, .passwordhash = user.passwordhash}     end if      return task(of applicationuser).fromresult(appuser) end function  public function findbynameasync(username string) task(of applicationuser) implements iuserstore(of applicationuser, guid).findbynameasync     dim user user = repo.getsingleordefault(of user)(new core.specification.specification(of user)(function(x) x.username = username))     dim appuser applicationuser = nothing     if user isnot nothing         appuser = new applicationuser(user.id) {.username = user.username, .passwordhash = user.passwordhash}     end if      return task(of applicationuser).fromresult(appuser)  end function  public function updateasync(user applicationuser) task implements iuserstore(of applicationuser, guid).updateasync     throw new notimplementedexception end function  public function getpasswordhashasync(user applicationuser) task(of string) implements iuserpasswordstore(of applicationuser, guid).getpasswordhashasync     dim paswordhash = repo.getdetail(of user)(user.id).passwordhash     return task(of string).fromresult(paswordhash) end function  public function haspasswordasync(user applicationuser) task(of boolean) implements iuserpasswordstore(of applicationuser, guid).haspasswordasync     dim paswordhash = repo.getdetail(of user)(user.id).passwordhash     dim haspassword boolean = not string.isnullorempty(paswordhash)     return task(of boolean).fromresult(haspassword) end function  public function setpasswordhashasync(user applicationuser, passwordhash string) task implements iuserpasswordstore(of applicationuser, guid).setpasswordhashasync     user.passwordhash = passwordhash     return task.fromresult(of object)(nothing) end function  end class 

i found issue, during login post method doing model.password = usermanager.passwordhasher.hashpassword(model.password) removed line , work fine.