It is important to verify the username and password right after you create it. It confirms your authentication and makes your username and password ready for use. You might face problem sometimes but these troubleshooting steps will help you to verify username password.
If you are getting error messages then it means there are some issues related to verification. You can also try the option verify your email.
You can also reset the password of the email account by choosing the website of the email service provider. You can reset the password.
You can also reconfigure the account or even if you are unable to reset the password then contact to service provider.