Permissions for are too open. It is required that your private key files are NOT accessible by others. code example
Example 1: Permissions 0644 for are too open. It is required that your private key files are NOT accessible by others. This private key will be ignored
chmod 600 ~/.ssh/id_rsaExample 2: It is required that your private key files are NOT accessible by others.
chmod 400 /Users/username/.ssh/id_rsa