Fix #157 Custom CF API key

Author: theRookieCoder

README.md

@@ -70,6 +70,8 @@ Remember to use an add-on like [cargo-update](https://crates.io/crates/cargo-upd
 
 Ferium stores profile and modpack information in it's config file. By default it is located at `~/.config/ferium/config.json`, but you can change this in 2 ways. You can set the `FERIUM_CONFIG_FILE` environment variable or set the `--config-file` global command flag, the flag always takes precedence.
 
+You can also set a custom CurseForge API Key using the `CURSEFORGE_API_KEY` environment variable.
+
 ### First Startup
 
 You can either have your own set of mods in what is called a 'profile', or install a modpack.

src/main.rs

@@ -17,7 +17,11 @@ use libium::config::{
 };
 use octocrab::OctocrabBuilder;
 use online::check;
-use std::{process::ExitCode, sync::Arc};
+use std::{
+    env::{var, var_os},
+    process::ExitCode,
+    sync::Arc,
+};
 use tokio::{runtime, spawn};
 
 const CROSS: &str = "×";
@@ -71,13 +75,13 @@ async fn actual_main(cli_app: Ferium) -> Result<()> {
     // Yes this is a personal API key, but I am allowed to write it in source.
     // The reason is the API key is used for tracking usage, it's not for authentication.
     // So please don't use this outside of Ferium, although telling you not to is all I can do...
-    let curseforge = Arc::new(Furse::new(
-        "$2a$10$QbCxI6f4KxEs50QKwE2piu1t6oOA8ayOw27H9N/eaH3Sdp5NTWwvO",
-    ));
+    let curseforge = Arc::new(Furse::new(&var("CURSEFORGE_API_KEY").unwrap_or_else(
+        |_| "$2a$10$QbCxI6f4KxEs50QKwE2piu1t6oOA8ayOw27H9N/eaH3Sdp5NTWwvO".into(),
+    )));
     let mut config_file = config::get_file(
         cli_app
             .config_file
-            .or_else(|| std::env::var_os("FERIUM_CONFIG_FILE").map(Into::into))
+            .or_else(|| var_os("FERIUM_CONFIG_FILE").map(Into::into))
             .unwrap_or_else(config::file_path),
     )
     .await?;