/// <inheritdoc /> public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context) { if (!await context.HasValidCredentials(this.verifyCredentials).ConfigureAwait(false)) { context.SetError("invalid_grant", "The user name or password is incorrect."); return; } var identity = await context.CreateIdentity(this.fillClaims).ConfigureAwait(false); var ticket = new AuthenticationTicket(identity, null); context.Validated(ticket); }