Fix compile errors

backend/Cargo.lock

@@ -12,6 +12,17 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "aes"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures",
+]
+
 [[package]]
 name = "ahash"
 version = "0.8.12"
@@ -191,6 +202,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "axum",
+ "base64 0.22.1",
  "chrono",
  "dotenvy",
  "hex",
@@ -1385,6 +1397,7 @@ version = "0.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d90b55eff1f0747d9e423972179672e1aacac3d3ccee4c1281147eaa90d6491e"
 dependencies = [
+ "aes",
  "base64 0.22.1",
  "bech32",
  "bip39",