Go to Upgrade Center, select Platform in the Filter By Dropdown. In the Optional Upgrades Column, search for:
Initiate the SAP Cloud Identity Services Identity Authentication Service Integration
If the entry exists, IAS is not yet set up. If it does not exist, the IAS configuration is probably already done.
cl_http_ext_webapp=>create_url_for_bsp_application( EXPORTING bsp_application = bsp_application " Name der BSP Applikation
bsp_start_page = bsp_start_page " Startseite der BSP Applikation
bsp_start_parameters = bsp_start_parameters " Startparameter der BSP Applikation
IMPORTING abs_url = DATA(lv_absolute_url ). " Absolute URL (Protokol, Host, Port, ...) der BSP Applikation