OPS$Oracle user after Wallet Creation in Oracle 12c

----- In Oracle 12.1.0.2, created the wallet by using below commands:

TEST$ orapki wallet create -wallet "/u01/app/oracle/admin/TEST/wallet" -pwd ****  -auto_login_local
Oracle PKI Tool : Version 12.1.0.2
Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.


TEST$ mkstore -wrl "/u01/app/oracle/admin/TEST/wallet" -createCredential TEST2 sys ********
Oracle Secret Store Tool : Version 12.1.0.2
Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.

Enter wallet password:
Create credential oracle.security.client.connect_string1

----- But when I logged into the database with sys user, the show user showed OPS$ORACLE user instead of sys:

TEST$ sqlplus /@TEST2

SQL*Plus: Release 12.1.0.2.0 Production on Thu Aug 9 13:09:38 2018

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Last Successful login time: Thu Aug 09 2018 03:18:20 -04:00

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Advanced Analytics and Real Application Testing options

SQL> sho user
USER is "OPS$ORACLE"
SQL>

----- So made following changes and it worked fine:

Put following entry in sqlnet.ora file:

SQLNET.WALLET_OVERRIDE = TRUE
The SQLNET.WALLET_OVERRIDE entry allows this method to override any existing OS authentication configuration.

and used mkstore to create the wallet:

TEST$  mkstore -wrl "/u01/app/oracle/admin/TEST/wallet" -createCredential TEST2 sys