added firebase and rudimentary leaderboard support

scripts/authentication.gd

@@ -0,0 +1,51 @@
+extends Control
+
+@onready var email_edit: LineEdit = $VBoxContainer/email_edit
+@onready var password_edit: LineEdit = $VBoxContainer/password_edit
+@onready var state_label: Label = %StateLabel
+
+func _ready() -> void:
+	Firebase.Auth.login_succeeded.connect(on_login_succeeded)
+	Firebase.Auth.login_failed.connect(on_login_failed)
+	Firebase.Auth.signup_succeeded.connect(on_signup_succeeded)
+	Firebase.Auth.signup_failed.connect(on_signup_failed)
+	
+	if Firebase.Auth.check_auth_file():
+		state_label.text = "Logged in"
+
+func _on_log_in_pressed() -> void:
+	var email = email_edit.text
+	var password = password_edit.text
+	Firebase.Auth.login_with_email_and_password(email,password)
+	
+	state_label.text = "Logging In"
+
+
+func _on_sign_up_pressed() -> void:
+	var email = email_edit.text
+	var password = password_edit.text
+	Firebase.Auth.signup_with_email_and_password(email,password)
+	
+	state_label.text = "Signing Up"
+
+func on_login_succeeded(auth):
+	print(auth)
+	state_label.text = "Login Success!"
+	Firebase.Auth.save_auth(auth)
+	visible = false
+	
+func on_signup_succeeded(auth):
+	print(auth)
+	state_label.text = "Signup Success!"
+	Firebase.Auth.save_auth(auth)
+	visible = false
+	
+func on_login_failed(error_code,message):
+	print(error_code)
+	print(message)
+	state_label.text = "Login failed. Error: %s" % message
+	
+func on_signup_failed(error_code,message):
+	print(error_code)
+	print(message)
+	state_label.text = "Signup failed. Error: %s" % message