Add a page to choose second factor

src/data/user.rs

@@ -26,6 +26,13 @@ impl TwoFactor {
             TwoFactorType::TOTP(_) => "Authenticator app"
         }
     }
+
+    pub fn login_url(&self, redirect_uri: &str) -> String {
+        match self.kind {
+            TwoFactorType::TOTP(_) => format!("/2fa_totp?id={}&redirect_uri={}",
+                                              self.id.0, redirect_uri)
+        }
+    }
 }
 
 #[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]