add skipValidation flag for authentication

docs/API.md

@@ -84,6 +84,7 @@ Returns a `Client` instance and perform login.
  * version : 1.8 or 1.9 or false (to auto-negotiate): default to 1.8
  * customPackets (optional) : an object index by version/state/direction/name, see client_custom_packet for an example
  * hideErrors : do not display errors, default to false
+ * skipValidation : do not try to validate given session, defaults to false
 
 ## mc.Client(isServer,version,[customPackets])
 

src/client/auth.js

@@ -3,6 +3,7 @@ const UUID = require('uuid-1345')
 
 module.exports = function (client, options) {
   const clientToken = options.clientToken || (options.session && options.session.clientToken) || UUID.v4().toString()
+  const skipValidation = false || options.skipValidation
   options.accessToken = null
   options.haveCredentials = options.password != null || (clientToken != null && options.session != null)
 
@@ -21,6 +22,7 @@ module.exports = function (client, options) {
     }
 
     if (options.session) {
+      if (!skipValidation) {
         yggdrasil.validate(options.session.accessToken, function (err) {
           if (!err) { cb(null, options.session) } else {
             yggdrasil.refresh(options.session.accessToken, options.session.clientToken, function (err, accessToken, data) {
@@ -38,6 +40,7 @@ module.exports = function (client, options) {
             })
           }
         })
+      }
     } else {
       yggdrasil.auth({
         user: options.username,

src/index.d.ts

@@ -38,6 +38,7 @@ declare module 'minecraft-protocol' {
 		port?: number
 		username: string
 		version?: string
+		skipValidation?: boolean
 	}
 
 	export class Server extends EventEmitter {