public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context_) { context_.OwinContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { "*" }); var user = await _repository.FindUser(context_.UserName, context_.Password); if (user == null) { context_.SetError("invalid_grant", "O usuario ou senha estao incorretos"); return; } var identity = await _repository.CreateIdentityAsync(user, context_.Options.AuthenticationType); identity.AddClaims(ExtendedClaimsProvider.GetClaims(user)); var ticket = new AuthenticationTicket(identity, AuthUtil.GetProperties(user, identity.Claims)); context_.Validated(ticket); }