How do we create PSFT token for the specified USERID ? For Example, Peopelsoft GenTOKEN() create tok

How do we create PSFT token for the specified USERID ? For Example, Peopelsoft GenTOKEN() create token for the user logged in. If user logged in as TEST and if we execute the command it will create token for TEST whereas we need to create TOKEN for TEST1.

Purpose: We are trying to switch user from USER A to USER B where are we dont have password for USER B. We want to create PSFT token for USer B and then use that token to switch from user A to User B.