Account Login Case

Test Cases
Test1 Given account has been registered before
When do login operation
Then should display how much times it has logged
Test2 Given account has been registered before
When login several times
Then login count should accumulate
Test3 Given account is not registered
When do login operation
Then should display invalid user
Test4 Given account is registered but never activated
When do loging operation
Then cant login remind you to activate at first
Test5 Given Account is registered and activated and never logged in before
When do login operation
Then Welcome message should be displayed when loggin in