Add check if OTP secrets length is 0 and updated docs

src/main/java/com/cringe_studios/cringe_authenticator_library/OTP.java

@@ -45,7 +45,7 @@ public abstract class OTP {
 	 * @param counter REQUIRED if HOTP, otherwise meaningless. The initial counter for HOTP (eg 21, if user reloaded counter 21 times)
 	 * @param periodInSeconds OPTIONAL (default 30) for TOTP, the refresh rate of the TOTP
 	 * @param checksum OPTIONAL: appends a checksum digit to the end of the string
-	 * @return returns your wallet to the lost-and-found office
+	 * @return returns a valid OTP object or null, which can be used to create a new OTP pin
 	 */ 
 	public static OTP createNewOTP(OTPType type, String secret, OTPAlgorithm algorithm, int digits, long counter, long periodInSeconds, boolean checksum) throws OTPException{
 		if(type == null) return null;

src/main/java/com/cringe_studios/cringe_authenticator_library/OTPType.java

@@ -17,7 +17,7 @@ public enum OTPType {
 	}
 
 	public OTP instance(String secret, OTPAlgorithm algorithm, int digits, long counter, long periodInSeconds, boolean checksum) {
-		if(/*type == null ||*/ secret == null /*|| counter < 0*/) {
+		if(/*type == null ||*/ secret == null || secret.length() == 0/*|| counter < 0*/) {
 			return null;
 		}