feat: add api key verification

src/utils/crypto.rs

@@ -0,0 +1,11 @@
+use sha2::{Digest, Sha256};
+
+pub fn hash_key(key: &str) -> String {
+    let mut hasher = Sha256::new();
+    hasher.update(key.as_bytes());
+    hasher
+        .finalize()
+        .iter()
+        .map(|b| format!("{:02x}", b))
+        .collect()
+}