When you working on two github account. You have to create two ssh-key and add them to your accounts (i.e: company account and personal account).
To switch between them, typically, you open terminal:
$ ll ~/.ssh/
$ eval “$(ssh-agent -s)”
$ ssh-add path/to/new/ssh
$ ssh -T git@github.com
It will annoys you alot.
Don’t tired any more. gaman is here to help you on that.