error:
Permissions 0644 for '/Users/christy/key.pem' are too open.
try:
chmod 400 /Users/christy/key.pem
reference:
SSH Key: “Permissions 0644 for 'id_rsa.pub' are too open.” on mac
Permissions 0644 for '/Users/christy/key.pem' are too open.
chmod 400 /Users/christy/key.pem
SSH Key: “Permissions 0644 for 'id_rsa.pub' are too open.” on mac