Cannot login using cmd

i want to upload my project to ionic cloud and ofcourse i have to login first,
so in my command prompt i type ionic login command prompt then ask me for email, so i entered my email that i registered before. and provide the password. but after i press ENTER ionic tell me that may be my email or my password is incorrect. But i am 1000000% sure that it is correct since i can log in to my account in ionic site…
is there anyone who face the same problem with me?
what is the solution for this?