wluma: [Bug]: permission denied erros if ran without sudo, no config found if ran with sudo

Steps for reproducing the issue

• download the releases
• create a config file in ~/.config/wluma/config.toml
• try to launch the built artifact without sudo and then with sudo.

What is the buggy behavior?

behavior when ran without sudo:

vega@dart ~/s/w/t/release [1]> ./wluma 
[2022-01-27T19:56:04Z WARN  wluma] Skipping 'eDP-1' as it might be disconnected: Permission denied (os error 13)
[2022-01-27T19:56:04Z INFO  wluma] Continue adjusting brightness and wluma will learn your preference over time.

behavior when ran with sudo:

 vega@dart ~/s/w/t/release [SIGINT]> sudo ./wluma
[2022-01-27T19:53:16Z WARN  wluma] Skipping 'keyboard-dell' as it might be disconnected: No such file or directory (os error 2)
[2022-01-27T19:53:16Z INFO  wluma] Continue adjusting brightness and wluma will learn your preference over time.
thread 'als' panicked at 'Unable to initialize ALS IIO sensor: "No iio device found"', src/main.rs:116:26
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

here’s a link to a file with RUST_BACKTRACE=full when running with sudo: https://paste.centos.org/view/33b45dcf

What is the expected behavior?

I think the issue there is that when it’s ran with sudo it thinks the user is root and looks for config file in /root/.config/wluma/config.toml

Logs

https://paste.centos.org/view/2df8ad43

Version

version 4.1.0, from the built artifact in releases folder

Environment

default command doesn't work, so here's information from neofetch, I guess.

             .',;::::;,'.                vega@dart 
         .';:cccccccccccc:;,.            --------- 
      .;cccccccccccccccccccccc;.         OS: Fedora Linux 35.20220125.0 (Silverblue) x86_64 
    .:cccccccccccccccccccccccccc:.       Host: Notebook NS50MU 
  .;ccccccccccccc;.:dddl:.;ccccccc;.     Kernel: 5.15.16-200.fc35.x86_64 
 .:ccccccccccccc;OWMKOOXMWd;ccccccc:.    Uptime: 1 day, 7 hours, 3 mins 
.:ccccccccccccc;KMMc;cc;xMMc;ccccccc:.   Packages: 1432 (rpm), 101 (flatpak) 
,cccccccccccccc;MMM.;cc;;WW:;cccccccc,   Shell: fish 3.3.1 
:cccccccccccccc;MMM.;cccccccccccccccc:   Resolution: 1920x1080 
:ccccccc;oxOOOo;MMM0OOk.;cccccccccccc:   DE: GNOME 41.3 (Wayland) 
cccccc;0MMKxdd:;MMMkddc.;cccccccccccc;   Theme: Adwaita-dark [GTK2/3] 
ccccc;XM0';cccc;MMM.;cccccccccccccccc'   Icons: Adwaita [GTK2/3] 
ccccc;MMo;ccccc;MMW.;ccccccccccccccc;    Terminal: gnome-terminal 
ccccc;0MNc.ccc.xMMd;ccccccccccccccc;     CPU: 11th Gen Intel i7-1165G7 (8) @ 4.700GHz 
cccccc;dNMWXXXWM0:;cccccccccccccc:,      GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics] 
cccccccc;.:odl:.;cccccccccccccc:,.       Memory: 6620MiB / 31889MiB 
:cccccccccccccccccccccccccccc:'.
.:cccccccccccccccccccccc:;,..                                    
  '::cccccccccccccc::;,.