DonB wrote:... it shows that my account does not exist. ..
Since you were able to reset your password, the account must exist. It could be that your language resource is misleading.
Out of the box, for English, ...
This is the first message:
account.login.unsuccessful Login was unsuccessful. Please correct the errors and try again.
Then it would be followed by the specific reason:
account.login.wrongcredentials The credentials provided are incorrect
account.login.wrongcredentials.customernotexist No customer account found
account.login.wrongcredentials.deleted Customer is deleted
account.login.wrongcredentials.lockedout Customer is locked out
account.login.wrongcredentials.notactive Account is not active
account.login.wrongcredentials.notregistered Account is not registered