You would have to get private key from metamask and login to Myetherwallet with the private key to do it. Which is not recommended way to login to a website.
RE: How to check which EOS public key is mapped to your ETH address with MyEtherWallet (MEW)
You are viewing a single comment's thread from:
How to check which EOS public key is mapped to your ETH address with MyEtherWallet (MEW)