Query Help. Seems easy but complicated for me

Question

Hey guys im trying to setup my application to check weather or not a user has an account made in my database.
The login uses a different authentication method then the application. As the login pulls from our intranet office database and the app uses users in a local apex db.
I need a query that will check after auth if the user has a account stored in apex db if so then the user will be redirected to page 4, if not then the user will be directed to page 7.
QUERY IM ATTEMPTING WITH NO RESULT
select count(*) from odf_user where login_name = :APP_USER.
if count(*) > 0 then (
wwv_flow_custom_auth_std.login( P_FLOW_PAGE => :APP_ID||':4');
else
www_flow_custom_auth_std.login( P_FLOW_PAGE => :APP_ID||':7');
endif;

Answer 1

Heres the code
declare
l_count NUMBER;
begin
select count(*) into l_count from odf_user where upper(login_name) = upper(:P101_USERNAME);
if l_count > 0 then
wwv_flow_custom_auth_std.login(
P_UNAME => v('P101_USERNAME'),
P_PASSWORD => :P101_PASSWORD,
P_SESSION_ID => v('APP_SESSION'),
P_FLOW_PAGE => :APP_ID||':4'
else
wwv_flow_custom_auth_std.login(
P_UNAME => v('P101_USERNAME'),
P_PASSWORD => :P101_PASSWORD,
P_SESSION_ID => v('APP_SESSION'),
P_FLOW_PAGE => :APP_ID||':7'
end if;
end;