Check user lockout for user log in from LDAP

[sishuoyang]

I am developing an enterprise application. All my user login solely from LDAP.
And I have an admin portal to manage all application users.

Admin user can set a user's LockoutEndDateUtc column to temporarily prevent the user from login.

However, the LoginManager doesn't check lockout status if the user is logged in from LDAP.

I have added the logic to check lockout status in this PR.

[sishuoyang]

Actually, I am thinking if it is ok to run UserManager.IsLockedOutAsync(user) for all type of login. In that case, below block can be placed above if (!loggedInFromExternalSource)

if (await UserManager.IsLockedOutAsync(user))
                    {
                        return new AbpLoginResult<TTenant, TUser>(AbpLoginResultType.LockedOut, tenant, user);
                    }

[hikalkan]

We assumed that LDAP already it's own lockout system. However, you are right, we can check lockout in either case. Can you make the change and update your PR. Thanks.

[hikalkan]

Thank you for your contribution.

[sishuoyang]

Thank you for your great framework.