tolerate no patrone creds

Signed-off-by: Xe Iaso <me@christine.website>

lib/patreon/src/lib.rs

@@ -90,7 +90,7 @@ pub enum Error {
     URLParse(#[from] url::ParseError),
 }
 
-#[derive(Debug, Serialize, Deserialize, Clone, Default)]
+#[derive(Debug, Serialize, Deserialize, Clone, Default, Eq, PartialEq)]
 pub struct Credentials {
     pub client_id: String,
     pub client_secret: String,

src/app/mod.rs

@@ -22,6 +22,11 @@ async fn patrons() -> Result<Option<patreon::Users>> {
     let creds: Credentials = envy::prefixed("PATREON_")
         .from_env()
         .unwrap_or(Credentials::default());
+
+    if creds == Credentials::default() {
+        return Ok(None);
+    }
+
     let mut cli = Client::new(creds)?;
 
     cli.refresh_token().await?;