No provider for UserService!

Ionic Framework ionic-v3
1 
Error: StaticInjectorError(AppModule)[UploaderPage -> UserService]: 
  StaticInjectorError(Platform: core)[UploaderPage -> UserService]: 
    NullInjectorError: No provider for UserService!

Hi everyone, im following this tutorial on youtube: https://www.youtube.com/playlist?list=PLYxzS__5yYQnpK36-GJjm7IEAuHR7IExa
But on #4 its giving me an error that i cannot figure out how to fix it, because it seems that everything is ok, but the problem is at the time to go to some page (register and login pages) it gives me the error ā€œcannot get /pageā€ and when i click on a ā€œuploadā€ tab it gives me the error from aboveā€¦ where is the place that i should take a look to make it works? thank you so much

Regards

2

Finally adding to Providers the userservice, was the solution, thanks anyway :slight_smile:

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