ORA-28000 the account is Locked/Expired in Oracle SQL Developer

Sometimes when we use SQL Developer after a long time some schemas will get locked as shown in the Image Below. we need to unlock schemas so that we can make use of that schemas.

We can Even observe the status of all the LOCKED and EXPIRED accounts by using the Below Query

select username,account_status from dba_users;

To Unlock the schemas we need  to follow the below procedure

1. Open SQL*Plus
2. then login to SYS as SYSDBA with administrators Password.
3. Then use the following Command
   

   ALTER USER hr ACCOUNT UNLOCK IDENTIFIED BY hr;
   
   

   You Can Even Refer to the below ScreenShot as well.