I think, it'd be easier to maintain & use the account with multiple options available. it's good that you provide multiple email options, but it'd be great if your provide to login using username. What is the use of a unique username if it can't be used instead of your email id for login? I changed my email id & was unable to login after that as your database didn't receive my other id. So, that made me lose all my progress with the previous account. Thank you!