Mnemonic from private key

I have the priatekey of an algo address created on the atomic wallet
I would like to import it to myalgo wallet
to retrieve opulous tokens
but it asks for 25 words
i read that Algorand SDK mnemonic function
can recover
but I have no idea how it can be done
can someone help me?

Go to
On the “More info” tab, see “Offline usage”

On an offline computer, start the bip39toalgo-webapp.html file
Select atomic wallet.
Enter your BIP39 mnemonic and passphrase.

Enjoy, and tip the author!

everything OK! I solved it thanks to you
if they’re successful … I’ll remember you
write me your address

thank you again