1.Verify that the username should not be less than 6 
characters.
2.Verify that the username should be more than 6 characters.
3.verify that the password should be encripted.
4.Verify that the character length of username should not 
be more than 20 character
5.Verify that the character length of password should not 
be more than 20 character
6.verify that invalid username and invalid password.
7.verify invalid username and valid password.
8.verify valid username and invalid password.
9.verify special character should in username and password.