Get wallet address by private key or seed phrase

[Chinzilla]

Hello @vmxkang, welcome to MetaMask community!

First of all, i took the liberty of editing your post and removing the name of the app you mentioned because such things are not allowed here, as per our rules(#6).

MetaMask Community Forum Manifesto

What is the MetaMask Community Forum? The MetaMask Community Forum, community.metamask.io, is the official forum for the MetaMask community. It is where MetaMask users and developers can interact with one another and with the ConsenSys/MetaMask team. To enable this space to be as useful as possible, we have guidelines that each member of the community must agree to follow before they are allowed to post. We encourage helping others with troubles, explaining complex concepts, offering knowledge…

Secondly, importing your Secret Recovery Phrase or private key in a 3rd party app is highly unsecure and you might have your wallet compromised because of it. MetaMask allows connection to Dapps but everything happens by connecting through the wallet, not separately.
Be very careful what you interact with and never share your Secret Recovery Phrase or private keys with anyone. As MetaMask wallet is self-custodial, a large part of keeping your wallet secure depends on you, the user.

Here are the MetaMask Docs and MetaMask Github repository as referrence to what you inquiried about, as well:

https://docs.metamask.io/guide/

MetaMask