Enter user-name: ^C
[oracle@DevOps3c71a98f2 bin]$ sqlplus sys/welcome@prajwal as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Wed Dec 7 14:58:08 2016

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ERROR:
ORA-01017: invalid username/password; logon denied

not able to create user in oracle 12c could you please help me with this