bash git clone command shortcut

clone.sh

clone () {
    if [ -z "$1" ]; then
        echo "Usage: clone <username> <repository> OR clone <repository> after setting up the default username"
        return 1
    fi

    username="$1"
    if [ -z "$2" ]; then
        username="simulationguest"
        repo="$1"
    else
        repo="$2"
    fi

    mkdir -p ~/Developer/$username
    cd ~/Developer/$username
    git clone [email protected]:$username/$repo.git
    cd ./$repo
}