fix(oidc): Fix login not working for missing groups claim

see #87

crates/oidc/src/error.rs

@@ -7,6 +7,9 @@ pub enum OidcError {
     #[error("Cannot generate redirect url, something's not configured correctly")]
     OidcParseError(#[from] ParseError),
 
+    #[error("Error fetching user info: {0}")]
+    UserInfo(String),
+
     #[error(transparent)]
     OidcConfigurationError(#[from] ConfigurationError),
 

crates/oidc/src/lib.rs

@@ -41,7 +41,7 @@ struct OidcState {
 #[derive(Debug, Deserialize, Serialize)]
 struct GroupAdditionalClaims {
     #[serde(default)]
-    pub groups: Vec<String>,
+    groups: Option<Vec<String>>,
 }
 
 impl openidconnect::AdditionalClaims for GroupAdditionalClaims {}
@@ -190,12 +190,14 @@ pub async fn route_get_oidc_callback<US: UserStore + Clone>(
         )?
         .request_async(&http_client)
         .await
-        .map_err(|_| OidcError::Other("Error fetching user info"))?;
+        .map_err(|e| OidcError::UserInfo(e.to_string()))?;
 
     if let Some(require_group) = &oidc_config.require_group {
         if !user_info_claims
             .additional_claims()
             .groups
+            .clone()
+            .unwrap_or_default()
             .contains(require_group)
         {
             return Ok((