Disable an Account Provider

See How To: Prevent users from authenticating using an Account Provider

Amazon Account Provider
Activate an Account Provider
Built-in Username and Password Account Provider
Custom Account Providers
Facebook Account Provider
GitHub Account Provider
Google Account Provider
Instagram Account Provider
LinkedIn Account Provider
Microsoft Account Provider
myID.be Account Provider
PayPal Account Provider
SAML-P Account Provider
StackExchange Account Provider
Twitter Account Provider
WS-Federation Account Provider