thodg/totp-rs

diff --git a/src/custom_providers.rs b/src/custom_providers.rs
new file mode 100644
index 0000000..7da52e7
--- /dev/null
+++ b/src/custom_providers.rs
@@ -0,0 +1,45 @@
+#[cfg(feature = "steam")]
+use crate::{Algorithm, TOTP};
+
+#[cfg(feature = "steam")]
+impl TOTP {
+    #[cfg(feature = "otpauth")]
+    /// Will create a new instance of TOTP using the Steam algorithm with given parameters. See [the doc](struct.TOTP.html#fields) for reference as to how to choose those values
+    ///
+    /// # Description
+    /// * `secret`: expect a non-encoded value, to pass in base32 string use `Secret::Encoded(String)`
+    ///
+    /// ```rust
+    /// use totp_rs::{Secret, TOTP};
+    /// let secret = Secret::Encoded("ABCDEFGHIJKLMNOPQRSTUVWXYZ234567".to_string());
+    /// let totp = TOTP::new_steam(secret.to_bytes().unwrap(), Some("username".to_string()));
+    /// ```
+    pub fn new_steam(secret: Vec<u8>, account_name: Option<String>) -> TOTP {
+        Self::new_unchecked(
+            Algorithm::Steam,
+            5,
+            1,
+            30,
+            secret,
+            Some("Steam".into()),
+            account_name
+                .map(|n| format!("Steam:{}", n))
+                .unwrap_or_else(|| "".into()),
+        )
+    }
+
+    #[cfg(not(feature = "otpauth"))]
+    /// Will create a new instance of TOTP using the Steam algorithm with given parameters. See [the doc](struct.TOTP.html#fields) for reference as to how to choose those values
+    ///
+    /// # Description
+    /// * `secret`: expect a non-encoded value, to pass in base32 string use `Secret::Encoded(String)`
+    ///
+    /// ```rust
+    /// use totp_rs::{Secret, TOTP};
+    /// let secret = Secret::Encoded("ABCDEFGHIJKLMNOPQRSTUVWXYZ234567".to_string());
+    /// let totp = TOTP::new_steam(secret.to_bytes().unwrap());
+    /// ```
+    pub fn new_steam(secret: Vec<u8>) -> TOTP {
+        Self::new_unchecked(Algorithm::Steam, 5, 1, 30, secret)
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index fe368f4..82cecca 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -47,6 +47,7 @@
 //! # }
 //! ```
 
+mod custom_providers;
 mod rfc;
 mod secret;
 mod url_error;