To log into your personal account you have to use unique data that you set during registration - username and password. If somehow you could not remember these details, we suggest to check your email and find welcome letter from Bit Data Trading Limited that we sent you after registration. This letter contains required details. Note that it might be in spam!
If the above recommendation does not help, you can just reset your password to get a new one.
Please contact us if you have any additional questions.