Auto load ssh key for all prompts on first prompt open. Also ask passphrase on first load

.zshrc

echo "Loading ssh file"
# Ssh-agent Settings
KEY=~/.ssh/id_rsa
SSHAGENT=/usr/bin/ssh-agent
export SSH_AGENT_PID=$(pgrep ssh-agent | head -1)
SSH_AUTH_SOCK=$(ls -1 /tmp/ssh-*/* 2>/dev/null | head -n 1 )
if [[ $(pgrep ssh-agent) == "" ]]; then
        rm -r /tmp/ssh-* &> /dev/null;
        eval $($SSHAGENT -s)
        ssh-add ${KEY}
        echo "Loading private ssh key"
else
        export SSH_AUTH_SOCK=${SSH_AUTH_SOCK}
        export SSH_AGENT_PID=$(ps -f|grep ssh-agent|head -1|awk '{print $2}')
        echo "Private ssh key loaded from another prompt, reusing"
fi