It should check for the existence of .local/bin, good catch!
I tested your code and it workes as expected only adding the path when the dir exists and is not in the PATH
```
if [ -d $HOME/.local/bin ]; then
    if [[ "$PATH" != *".local/bin"* ]]; then
        echo "Your path is missing ~/.local/bin"
        PATH=$HOME/.local/bin:$PATH
    fi
fi