I am not clear what you are asking. 1) What do you mean by "commercially"? If you past certification, your skill is approved and appears on the list that everyone sees. 2) What do you mean by "use skill by login"? You might look up the "account linking" feature. That may be what you are looking for.
>I want to use my skills to a specific user. Sorry. Still not getting it. Do you want your entire skill to be used by a single user? Or do you want to enable your skill one user at a time? >"Commercially" means that the cost when using my skill. This is not a complete sentence. Do you want to charge for using your skill? Or are you concerned about if you will be charged for your skill's use of Amazon services?
I mean when i enable my skill, i want to provide my skill one user at a time by login. And i want to charge for using my skill is it possible? I have one more question that how many sentences does Alexa recognize?
>I mean when i enable my skill, i want to provide my skill one user at a time by login. Read about account linking. This explains how you can provide a login mechanism for your skill. >And i want to charge for using my skill is it possible? If you are linking to a web application, you can do anything you want. You will need to do all the work yourself though. Amazon just let everyone use your skill. There isn't a "skill store" yet. >I have one more question that how many sentences does Alexa recognize? You list all the sentences you want it to recognize in your utterance file. The file is limited to about 200K.