Possible input conditions are :

1)Input password as = 6abcde (ie number first)
2)Input password as = abcde8(ie character first)
3)Input password as = 123456 (all numbers)
4)Input password as = abcdef (all characters)
5)Input password less than 6 digit
6)Input passowrd greater than 6 digits
7)Input password as special characters
8)Input pasword in CAPITAL ie uppercase
9)Input password including space

Including special characters also

Possible input conditions are :

1)Input password as = 6abcde (ie number first)
2)Input password as = abcde8(ie character first)
3)Input password as = 123456 (all numbers)
4)Input password as = abcdef (all characters)
5)Input password less than 6 digit
6)Input passowrd greater than 6 digits
7)Input password as special characters
8)Input pasword in CAPITAL ie uppercase
9)Input password including space

Like all of them given the answer , i would like to add 
that is 

PASSWORD :(SPACE)followed by alphabets /numericals /alpha 
numericals/

we can check this through r techniques BVA and ECP

        BVA                    ECP

min=1      pass           VALID          INVALID
min+1=2    PASS        [A-Z a-z 0-9]     all blank fields
MIN-1=0    FAIL          {1,6}            all special chars
MAX=6      PASS
MAX-1=5    PASS
MAX+1=7    FAIL

1) With no values
2) With valid alphanumeric value.
3) With invalid alphabetic value.
4) With invalid numeric value.
5) With special character values >6.
6) with > 6 spaces with spacebar.
7) with < 6 digits

and many more

let me know, is it Login operation or Login creation ?

Nuthan Kumar V
Testing Engineer.,