use custom callbackPathHttpMethod

When I logged in from a mobile app, In some cases It's necesary to use POST with the callbackPath

provider conf example
  "facebook-login-token": {
    "provider": "facebook",
    "module": "passport-facebook-token",
    "clientID": appConfig.facebookClientID,
    "clientSecret": appConfig.facebookClientSecret,
    "callbackPath": "/auth/facebook/callback-token",
    "scope": ["email"],
    "json": true,
    "callbackPathHttpMethod":"POST"
  },