A bash script to switch between multiple github users (ssh keys)

switch-github-user.sh

#!/bin/bash
gh_user="${1:-Nothing}"

if [ "$gh_user" == 'USER1' ]; then
  ssh-add -D
  git config --global user.email "USERNAME_1_EMAIL"
  ssh-add ~/.ssh/id_ed1
elif [ "$gh_user" == 'USER1' ]; then
  ssh-add -D
  git config --global user.email "USERNAME_2_EMAIL"
  ssh-add ~/.ssh/id_ed2
else
  echo 'Nothing was applied'
  exit 1
fi
echo "$gh_user applied!"
# git config user.email
ssh -T [email protected]
exit 0

# Instruction:
# First of all, enter `chmod +x switch-github-user.sh` after downloading the file.
# Then just use the script: `./switch-github-user.sh USER1`, where `USER1` is your gh_user specified.