Use Multiple ssh for different host

readme.md

when you have id_rsa and id_rsa_2 in .ssh folder

Host           gitlab.com
HostName       gitlab.com
IdentityFile   C:\Users\<user name>\.ssh\id_rsa
User           <user name>


Host           gitlab_2
HostName       gitlab.com
IdentityFile   C:\Users\<user name>\.ssh\id_rsa_2
User           <user name>

or

IdentityFile ~/.ssh/my_key2_rsa

ref: https://stackoverflow.com/questions/23537881/fingerprint-has-already-been-taken-gitlab