Move oidc to dedicated crate

crates/oidc/src/config.rs

@@ -0,0 +1,27 @@
+use openidconnect::{ClientId, ClientSecret, IssuerUrl, Scope};
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize, Clone, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum UserIdClaim {
+    // The correct option
+    Sub,
+    // The more ergonomic option if you know what you're doing
+    #[default]
+    PreferredUsername,
+}
+
+#[derive(Deserialize, Serialize, Clone)]
+#[serde(deny_unknown_fields)]
+pub struct OidcConfig {
+    pub name: String,
+    pub issuer: IssuerUrl,
+    pub client_id: ClientId,
+    pub client_secret: Option<ClientSecret>,
+    pub scopes: Vec<Scope>,
+    #[serde(default)]
+    pub allow_sign_up: bool,
+    pub require_group: Option<String>,
+    #[serde(default)]
+    pub claim_userid: UserIdClaim,
+}