diff --git a/src/credential_manager.rs b/src/credential_manager.rs
index 786fda8..cf492a5 100644
--- a/src/credential_manager.rs
+++ b/src/credential_manager.rs
@@ -1,4 +1,4 @@
-use std::fs::create_dir_all;
+use std::{fs::create_dir_all, process::Command};
 
 use aes_gcm::{aead::{Aead, OsRng}, AeadCore, Aes256Gcm, Key, KeyInit, Nonce};
 use app_dirs2::{AppDataType, AppInfo, app_root};
@@ -23,23 +23,40 @@ pub struct Credential {
 
 impl Credential {
     pub fn new(user: &str, password: &str, totp_command: Option<String>) -> Credential {
-        let totp_command = match totp_command {
-            Some(totp_command) => Some(totp_command.to_string()),
-            None => None
-        };
-
         Credential {
             user: user.to_string(),
             password: password.to_string(),
             totp_command
         }
     }
+
+    pub fn totp(&self) -> Option<String> {
+        match self.totp_command.clone() {
+            Some(totp_command) => {
+                let parts = totp_command.split(" ").collect::<Vec<&str>>();
+                let command = parts.first()?.to_string();
+                let args = totp_command[..command.len()].to_string();
+
+                let output = Command::new(command)
+                     .arg(args)
+                     .output()
+                     .expect("failed to execute process");
+
+                Some(String::from_utf8_lossy(&output.stdout).to_string())
+            },
+            None => None
+        }
+    }
 }
 
 pub struct CredentialManager {
 }
 
 impl CredentialManager {
+    pub fn new() -> CredentialManager {
+        CredentialManager { }
+    }
+
     fn get_database(&self) -> Result<Connection> {
         // Get the path to the credential database
         let mut path = app_root(AppDataType::UserConfig, &AppInfo{
@@ -178,4 +195,14 @@ impl CredentialManager {
             Err(_) => Err(anyhow::Error::msg("An error occurred closig the database."))
         }
     }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::CredentialManager;
+
+    #[test]
+    fn create_credential_manager() {
+        let credential_manager = CredentialManager::new();
+    }
 }
\ No newline at end of file
diff --git a/src/subcommands/login_subcommand.rs b/src/subcommands/login_subcommand.rs
index e4302f2..5bd0319 100644
--- a/src/subcommands/login_subcommand.rs
+++ b/src/subcommands/login_subcommand.rs
@@ -12,7 +12,7 @@ impl Subcommand for LoginSubcommand {
         let url = arg_matches.get_one::<String>("URL").context("URL not provided.")?;
         let user = arg_matches.get_one::<String>("USER").context("USER not provided.")?;
 
-        let credential_manager = CredentialManager { };
+        let credential_manager = CredentialManager::new();
 
         if !credential_manager.has_credential(url)? {
             // TODO need to ask for password from user
diff --git a/src/subcommands/logout_subcommand.rs b/src/subcommands/logout_subcommand.rs
index a7604b8..94846ef 100644
--- a/src/subcommands/logout_subcommand.rs
+++ b/src/subcommands/logout_subcommand.rs
@@ -11,7 +11,7 @@ impl Subcommand for LogoutSubcommand {
     fn execute(&self, arg_matches: &ArgMatches) -> Result<()> {
         let url = arg_matches.get_one::<String>("URL").context("URL not provided.")?;
 
-        let credential_manager = CredentialManager { };
+        let credential_manager = CredentialManager::new();
         credential_manager.remove_credential(url)?;
 
         Ok(())