can't open vs code via terminal in mac code example

Example 1: open visual studio code from terminal mac

#Add Bash alias in .bash_profile ?
$ alias code="open -a /Applications/Visual\ Studio\ Code.app"

#Open Visual Studio Code by command
$ code .

Example 2: open vscode from terminal mac

open Visual Studio Code 
press Cmd+shift+p
search for ``Shell command: install 'code' command in PATH.`` and click it
works in terminal
#Open Visual Studio Code by command
$ code .