It is impossible to reset your passphrase
Blockchain is designed to be completely decentralized, therefore it is technically impossible to reset your passphrase or retrieve it.
The user is the only one who has the passphrase. There is no central authority which controls your funds, like in the traditional banking system.
Not even the developers can reset your passphrase.
The only way to submit transactions from an account on the blockchain is to use the original passphrase (from which the cryptographic private/public key pair is derived).
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