Create key

$ssh-keygen -t rsa -C "your_email@youremail.com

Creates a new ssh key using the provided email

Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/you/.ssh/id_rsa):

check if ssh-agent is running or not

$exec ssh-agent bash
$ssh-add /c/Users/you/.ssh/id_rsa_two

Create a config file But the fun is not over yet! You need to set up the two profiles in a config file. Create /c/Users/you/.ssh/config and make it look like this:

#Account one
Host one.github.com
    HostName github.com
    PreferredAuthentications publickey
		User git
    IdentityFile /c/Projects/.ssh/id_rsa

#Account two
Host two.github.com
    HostName github.com
    PreferredAuthentications publickey
		User git
    IdentityFile /c/Projects/.ssh/id_rsa_two

check if it is working fine

$ssh -T git@github.co
$ssh -T git@github.com -i /c/Users/you/.ssh/id_rsa_two

then set git remote like this git@one.github.com:one/one..git