The username you entered contains characters that are not letters or numbers. If you entered a space or a dash (-) you'll probably get this error.
Health
bhaskaran7010
Ben10, Johnny5, THX1138...
Username is the public name that you are known by. Password is a secret alphanumeric that only you know and use to gain access to a software programme, user account, web site etc.
Alphanumeric codes are a mixture of codes from letters and numbers.
No. "Alphanumeric" refers only to letters and numbers.
no, this is not an alphanumeric character because it has more than one characters
alphanumeric characters are just the alphabet and the digits 0-9. So chances are, it's already written in alphanumeric characters.
Alphanumeric only passwords can only contains letters A-Z and numbers 0-9. An example of an Alphanumeric only password: hello123
! @ # $ % ^ & * ( ) > < { }
A primary key can be alphanumeric, containing both letters and numbers.
Any character which is not A-Z or 0-9. Examples of non-alphanumeric characters: !"£$%^&*()