You login credentials were sent the moment you joined.  If you missed it, 9.9 times out of 10 your login email is hiding in your spam or promotions folder 🤗 

You can reset your password on the Log In screen. Click "Forgot Password" under the big login button. Be sure to use the email you signed up with. Hint: after resetting your password, look for the email in your spam folder.

We are human. To ensure there are no mistakes, copy and paste the computer generated password. This usually helps.