TypeError: You provided 'undefined' where a stream was expected

Question

I have an Ionic app that has a user provider with a signup() method:

doSignup() {
  // set         


        

Answer 1

In my case, the error was caused by a different problem.

I was providing the service in two different points. I had written:

@Injectable({provideIn: 'root'}) and I was also providing the module in the app.module.ts. So if you encountered this error you can check this before going ahead