You do not have to specify a password for the user. A user without a password cannot connect to the database. This is useful
if you are creating a group and do not want anyone to connect to the database using the group user ID. A user ID must be a
User IDs and passwords cannot:
begin with white space, single quotes, or double quotes
end with white space
A password can be either a valid identifier, or a string (maximum 255 bytes) placed in single quotes. Passwords are case sensitive.
It is recommended that the password be composed of 7-bit ASCII characters, as other characters may not work correctly if the
database server cannot convert them from the client's character set to UTF-8.