Method constructor

packages/firebase-auth/index.ios.ts:774–778

(providerId: string)

	_customParameters: { [key: string]: string };
	_scopes: string[];
	constructor(providerId: string) {
		this._providerId = providerId;
		this._customParameters = {};
		this._scopes = [];
	}

	get _builder() {
		const builder = FIROAuthProvider.providerWithProviderID(this._providerId);