How To Disable Simultaneous Connections By One User On Oracle

i am using oracle 12, and hoping to find how can i enable or disable simultaneous connections for my database for each user. i found codes regarding dispatchers and other ones incl

Solution 1:

Create a new profile as

CREATE PROFILE <profile_name> LIMIT 
   SESSIONS_PER_USER          1
   CPU_PER_SESSION            UNLIMITED 
   CPU_PER_CALL               <some_value>
   CONNECT_TIME               <some_value>
   LOGICAL_READS_PER_SESSION  DEFAULT 
   LOGICAL_READS_PER_CALL     <some_value>
   PRIVATE_SGA                <some_value>
   COMPOSITE_LIMIT            <some_value>; 

note: choose other parameters as per requirement, you can get current profile parameter values from dba_profile view and use them in the above query. Before that get the profile name of the user using below query

SELECT profile FROM dba_users WHERE username = <user_name>;

Then ALTER USER

ALTER USER <user_name> PROFILE <profile_name>;