title: Flutter: Not able to use Google and Facebook plugins together
body: <p>This is the first time in my life that I am asking a question in a forum. I am really desperate. I have added Google Signin with the plugin google_sign_in: ^4.5.6 to my app but as soon as I add the plugin flutter_facebook_auth: ^2.0.0+1 or flutter_facebook_login: ^3.0.0 and I start my app, I get the following error:</p>
  <p>MissingPluginException (MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences))</p>
  <p>Please help me! Thank you so much!</p>
  <p>UPDATE: Flutter clean or rebuild did not help</p>