Adding multiple Github Accounts

Configure the following things:

Go to your .ssh

$ <editor> $HOME/.ssh

Essentially, Link your keys to different accounts on your config.

How to create a new key?

$ ssh-keygen -t rsa -b 4096 -C "your_email@example.com" where rsa is the key type…

$ <editor> $HOME/.ssh/config

Host github.com-tuxwork
   HostName github.com
   User git
   IdentityFile ~/.ssh/id_tuxwork # your work key name
   IdentitiesOnly yes

Host github.com-tuxpersonal
  Hostname github.com
  User git
  IdentityFile ~/.ssh/id_tuxpersonal # your personal key name
  IdentitiesOnly yes

Make sure to add your newly created key

ssh-add $HOME/.ssh/id_rsa ( is your your newly created key)

Update your repos

Now go to your repo, make sure your repos are hyphenated as mentioned in the config.

$ cd <your_repo>

$ git config --local -e

...
...
[remote "origin"]
        url = git@github.com-tuxpersonal:tuxsisir/tuxsisir.github.io.git
        fetch = +refs/heads/*:refs/remotes/origin/*

Update url to github.com-tuxpersonal (hyphenated) as mentioned in the config.

References:

Handling Multiple Github Accounts on MacOS