Always normalise vaultId and trim token

backend/sync_server/src/utils/normalize.rs

@@ -0,0 +1,11 @@
+use serde::{Deserialize, Deserializer};
+
+pub fn normalize<'de, D>(deserializer: D) -> Result<String, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let s = String::deserialize(deserializer)?;
+    Ok(normalize_string(&s))
+}
+
+pub fn normalize_string(s: &str) -> String { s.trim().to_lowercase() }