If you are a Linux or a Macos user just add flet-cli to Your .zshrc or .bashrc file
~$ chmod +x flet-cli
~$ chmod +x flet-cli/bin/flet
~$ vim .zshrc # For zshrc default shell
~$ vim .bashrc # For zshrc default shell
Add Autotype to your PATH in your .zshrc or .bashrc file
export PATH="$PATH:path of flet-cli/bin"
Restart the terminal
~$ flet --help