How to create Oracle Apps User from Backend?

DECLARE

v_user_name VARCHAR2 (100) := 'GTEST';

v_Email VARCHAR2(100):='giridhar.t22@gmail.com';

BEGIN

 fnd_user_pkg.createuser

(x_user_name => v_user_name,

 x_owner => NULL,

 x_unencrypted_password => 'Welcome123',

 x_session_number => 0,

 x_start_date => SYSDATE,

 x_end_date => NULL,

 x_last_logon_date => NULL,

 x_description => '',

 x_password_date => NULL,

 x_password_accesses_left => NULL,

 x_password_lifespan_accesses => NULL,

 x_password_lifespan_days => NULL,

 x_employee_id => NULL,

 x_email_address => v_email,

 x_fax => NULL,

 x_customer_id => NULL,

 x_supplier_id => NULL,

 x_user_guid => NULL,

 x_change_source => NULL

 );

 

 fnd_user_pkg.addresp(username => v_user_name

 ,resp_app => 'SYSADMIN'

 ,resp_key => 'SYSTEM_ADMINISTRATOR'

 ,security_group => 'STANDARD'

 ,description => NULL

 ,start_date => SYSDATE

 ,end_date => null);

 COMMIT;

END;