How to log in with user credentials from database table

Question

Hello all.
I have a table named users_1 in my database. This table has columns named username, password, email and userid. On userid, I have put a sequence.
Now, I have manually made 1 row in this table, with in it the user credentials.
How can I edit my application so that I can use these credentials to log onto the application?
Please, a step-by-step text would make me rather happy, instead of getting a link with information that I should read. I've read most of it, and it just doesn't make any sense to me, so I prefer a guide-trough.
Thanks..

Answer 1

Hi Magali,
You want only user from database can access your application.
follow the steps given below.
Step1  :  create function to authenticate users
create or replace FUNCTION  "CUSTOM_AUTHENTICATE" (p_username in VARCHAR2, p_password in VARCHAR2)
return BOOLEAN
is
  l_password varchar2(4000);
  l_stored_password varchar2(4000);
  l_count number;
begin
select count(*) into l_count from users_1 where upper(username) = upper(p_username);
if l_count > 0 then
   select upper(password) into l_stored_password from users_1 where upper(username) = upper(p_username);
   l_password :=  upper(p_password);
    if l_password = l_stored_password then
      return true;
    else
      return false;
    end if;
else
  return false;
end if;
end;
Step2  : create authentication scheme for your application
Go to Application Builder->select your application->shared component->security->authentication scheme->create
a) custom scheme : Based on a pre-configured scheme from the gallery
b) give some name to your scheme like custom_scheme or something
c)scheme type : database account
d) verify function name = return CUSTOM_AUTHENTICATE
e) go to = Login Page
f) Logout url = f?p=&APP_ID.:101 // here 101 is login page no..so you can set your login page no.
step3  : make this scheme as current scheme
select your scheme and click make current
now try to login into your application from your database users..
Hope this will helps you,
Thanks,
Jitendra