To change an email address for your QuickBlox account, you need to do the following:
1. Log in to your QuickBlox account.
2. Click on the profile image in the upper right corner and navigate to Profile or go to https://admin.quickblox.com/account
3. Type a new email and fill in the Password field.
4. Click on Save profile.
Feel free to check our official documentation for more information that will help you to integrate QuickBlox services into your applications / projects or contact our Support team by submitting a ticket if you have any other questions.