Registration endpoint fixing

server/src/util/mod.rs

@@ -0,0 +1,3 @@
+mod util;
+
+pub use util::*;

server/src/util/util.rs

@@ -0,0 +1,19 @@
+use rand::{Rng, RngCore};
+
+// This will do for now
+pub fn hex_string(length: usize) -> String {
+    let mut rng = rand::thread_rng();
+    let mut bytes = vec![0u8; length];
+    rng.fill(&mut bytes[..]);
+    bytes.iter().map(|b| format!("{:X}", b)).collect::<String>()[..length].to_string()
+}
+
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_random_hex_string() {
+        let s = hex_string(16);
+        assert_eq!(s.len(), 16);
+    }
+}