You'll need to have at least one of your account related information (i.e email / username and any recovery options, if set up). Once you have that here's how you can regain access: https://goo.gl/KDQJKR . Let us know if this helps!
By chance, did you already try recovering your account by going through these steps: https://goo.gl/8HPfKr ? Let us know if that helps!
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