Output email in error in case of validation failure

geneit_backend/src/utils/encode_utils.rs

@@ -0,0 +1,6 @@
+use base64::{engine::general_purpose, Engine as _};
+
+/// Encode a base64 string
+pub fn base64_enc<T: AsRef<[u8]>>(b: T) -> String {
+    general_purpose::STANDARD_NO_PAD.encode(b)
+}