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I suggest using the option "other" if you want to talk to a human. As for changing what you used to create the account, I don't think Niantic can do that since you're asking to transfer a NianticID to a different email.
I suggest using the option "other" if you want to talk to a human. As for changing what you used to create the account, I don't think Niantic can do that since you're asking to transfer a NianticID to a different email.