Cannot actually override provider in login method

[chimon2000]

Taken from the login function definition

Performs a login attempt, using the provider specified via attribute/property, or optionally via provider argument to the login function. Optionally, provider-specific login parameters can be specified via attribute (JSON)/property, or via the params argument to the login function.

I do not see where I am able to pass in the provider, and when specified in the params, it is ignored and the method attempts to login using the original provider.

[VandeurenGlenn]

Did you try something like this already?

<button on-tap="{{googleLogin}}">Google</button>
<button on-tap="{{githubLogin}}">Github</button>

<script>
  ...
  googleLogin: function() {
      this.$.fbLogin.provider = 'google';
      this.$.fbLogin.login();
  },
  githubLogin: function() {
      this.$.fbLogin.provider = 'github';
      this.$.fbLogin.login();
  },
  ...
</script>