Network

wifi on its own rescans and lists the networks in range. wifi "MY NETWORK" connects to one. An open network, or one you have joined before, connects straight away, and a secured one asks for the password.

From a keybind or a script there is nobody to ask, so pass it instead:

wifi "MY NETWORK" "my password"

wifi --help lists both forms. It uses NetworkManager if it is running, and iwd otherwise.