chore(FLOW-2123): Add examples

Signed-off-by: Cléo REBERT <cleo.rebert-ext@treezor.com>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "totp-rs"
-version = "4.0.0"
+version = "4.1.0"
 authors = ["Cleo Rebert <cleo.rebert@gmail.com>"]
 rust-version = "1.59"
 edition = "2021"

README.md

@@ -34,6 +34,7 @@ Add support for Steam TOTP tokens.
 4. [Enable otpauth url support](#with-otpauth-url-support)
 5. [Enable gen_secret support](#with-gensecret)
 6. [With RFC-6238 compliant default](#with-rfc-6238-compliant-default)
+7. [New TOTP from steam secret](#new-totp-from-steam-secret)
 
 ### Understanding Secret
 ---
@@ -216,3 +217,24 @@ fn main() {
     println!("code: {}", code);
 }
 ```
+
+### New TOTP from steam secret
+---
+Add it to your `Cargo.toml`:
+```toml
+[dependencies.totp-rs]
+version = "^4.1"
+features = ["qr"]
+```
+You can then do something like:
+```Rust
+use totp_rs::{TOTP, Secret};
+
+fn main() {
+    let totp = TOTP::new_steam(
+        Secret::Encoded("KRSXG5CTMVRXEZLUKN2XAZLSKNSWG4TFOQ".to_string()).to_bytes().unwrap(),
+    ).unwrap();
+    let code = totp.get_qr()?;
+    println!("{}", code);   
+}
+```

examples/steam.rs

@@ -0,0 +1,46 @@
+#[cfg(feature = "steam")]
+use totp_rs::{Secret, TOTP};
+
+#[cfg(feature = "steam")]
+#[cfg(feature = "otpauth")]
+fn main() {
+    // create TOTP from base32 secret
+    let secret_b32 = Secret::Encoded(String::from("OBWGC2LOFVZXI4TJNZTS243FMNZGK5BNGEZDG"));
+    let totp_b32 = TOTP::new_steam(
+        secret_b32.to_bytes().unwrap(),
+        "user-account".to_string(),
+    );
+
+    println!(
+        "base32 {} ; raw {}",
+        secret_b32,
+        secret_b32.to_raw().unwrap()
+    );
+    println!(
+        "code from base32:\t{}",
+        totp_b32.generate_current().unwrap()
+    );
+}
+
+#[cfg(feature = "steam")]
+#[cfg(not(feature = "otpauth"))]
+fn main() {
+    // create TOTP from base32 secret
+    let secret_b32 = Secret::Encoded(String::from("OBWGC2LOFVZXI4TJNZTS243FMNZGK5BNGEZDG"));
+    let totp_b32 = TOTP::new_steam(secret_b32.to_bytes().unwrap());
+
+    println!(
+        "base32 {} ; raw {}",
+        secret_b32,
+        secret_b32.to_raw().unwrap()
+    );
+    println!(
+        "code from base32:\t{}",
+        totp_b32.generate_current().unwrap()
+    );
+}
+
+#[cfg(not(feature = "steam"))]
+fn main() {
+
+}

src/custom_providers.rs

@@ -44,6 +44,7 @@ impl TOTP {
 
 #[cfg(all(test, feature = "steam"))]
 mod test {
+    #[cfg(feature = "otpauth")]
     use super::*;
 
     #[test]