You can use the APEX_CUSTOM_AUTH package to perform various operations related to authentication and session management.

• APPLICATION_PAGE_ITEM_EXISTS Function
  
• CURRENT_PAGE_IS_PUBLIC Function
  
• DEFINE_USER_SESSION Procedure
  
• GET_COOKIE_PROPS Procedure
  
• GET_LDAP_PROPS Procedure
  
• GET_NEXT_SESSION_ID Function
  
• GET_SECURITY_GROUP_ID Function
  
• GET_SESSION_ID Function
  
• GET_SESSION_ID_FROM_COOKIE Function
  
• GET_USER Function
  
• GET_USERNAME Function
  
• IS_SESSION_VALID Function
  
• LOGIN Procedure
  
• LOGOUT Procedure [DEPRECATED]
  
• POST_LOGIN Procedure
  
• SESSION_ID_EXISTS Function
  
• SET_SESSION_ID Procedure
  
• SET_SESSION_ID_TO_NEXT_VALUE Procedure
  
• SET_USER Procedure