diff --git a/src/config.rs b/src/config.rs
index 788bf79..c56bd8a 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -57,7 +57,8 @@ fn write_config(
     Ok(())
 }
 
-pub fn add_trusted_key(config_path: &str, key: Vec<u8>) -> Result<()> {
+pub fn add_trusted_key(key: Vec<u8>) -> Result<()> {
+    let config_path = get_config_path();
     let mut conf = get_all_vars().unwrap();
     conf.trusted_keys.push(key);
     let encoded_public_key = general_purpose::STANDARD.encode(conf.public_key);
@@ -69,7 +70,7 @@ pub fn add_trusted_key(config_path: &str, key: Vec<u8>) -> Result<()> {
         .collect();
 
     write_config(
-        config_path,
+        &config_path,
         &encoded_public_key,
         &encoded_private_key,
         encoded_trusted_keys,
diff --git a/src/main.rs b/src/main.rs
index 0c62c95..f2c6f35 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -66,8 +66,9 @@ async fn main() -> Result<()> {
                 crate::client::run_client(sock, server_addr, &filename, &auth, trusted_keys)
                     .await?;
             }
-            Command::AddKey { key: _ } => {
-                todo!();
+            Command::AddKey { key } => {
+                let decoded_key = general_purpose::STANDARD.decode(key)?;
+                crate::config::add_trusted_key(decoded_key)?;
             }
         };
     }