Using XUSER 

User data for setting up a database session can be predefined and saved by entering a user key (USER_KEY) using the tool XUSER. When the DBMCLI or the C/C++ Precompiler is called or an SAP system is started, the system can access the required XUSER data by entering the relevant user key).

XUSER can manage up to 32 combinations of XUSER data per operating system user.

Use