When Oracle creates a new normal account, the reason for not being able to log in is to add double quotes to the username ____oracle

CREATE USER "NewUser" identified by "NewUser"
DEFAULT tablespace Crm_data
Temporary tablespace TEMP
Account UNLOCK;

Today, I created a user named NewUser on the oracle10g, but logged in normal state, always prompting for unsuccessful login, username password error,

I originally created the user is added double quotes, the actual login username is "NewUser", the password is NewUser or "NewUser" can be logged in with normal

To

CREATE USER NewUser identified by NewUser
DEFAULT tablespace Crm_data
Temporary tablespace TEMP
Account UNLOCK;

Do not add double quotes