SOLVED
I am trying to put authentication on firebase. I finish my code, and, when I tried it, it says:
The given sign-in provider is disabled for this Firebase project. Enable it in the Firebase console, under the sign-in method tab of the Auth section.
I tried to search on YouTube and Google. But I didn´t find anything.

tmadhukersigned in usinggoogle- Fire-In-D-Hole