Negative. If you are using the user creation under Network Wide > Configure > Users, you can create new user accounts like normal, and there should be a pre-checked checkbox that you can turn off so the user will not get an email with their password, however it must be a valid email address, and that user will have to get an email advising them they have been authorized to use a particular SSID. I believe un-checking the box only suppresses the username & password in the email.
Since they must get an email to a valid inbox as part of the process, perhaps the best option might be to prime the user(s) with an email of your own in advance? That "priming" email could explain what to do, which might involve them being taken to the account info update page where they can update their email or password or view balance, etc. Hope that might help. More info here: https://documentation.meraki.com/MR/Splash_Page/Managing_User_Accounts_using_Meraki_Authentication