adding description for totpsecret constructor

Author: bhparijat

packages/auth/src/platform_browser/mfa/assertions/totp.ts

@@ -21,6 +21,13 @@
  * @public
  */
 export class TotpSecret {
+  /**
+   * Constructor for TotpSecret.
+   * @param secretKey - Shared secret key/seed used for enrolling in TOTP MFA and generating otps.
+   * @param hashingAlgorithm - Hashing algorithm used.
+   * @param codeLength - Length of the one-time passwords to be generated.
+   * @param codeIntervalSeconds - The interval (in seconds) when the OTP codes should change.
+   */
   constructor(
     readonly secretKey: string,
     readonly hashingAlgorithm: string,