diff --git a/package-lock.json b/package-lock.json
index 08b10f2..542cf69 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -251,18 +251,18 @@
       },
       "dependencies": {
         "mime-db": {
-          "version": "1.35.0",
-          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.35.0.tgz",
-          "integrity": "sha512-JWT/IcCTsB0Io3AhWUMjRqucrHSPsSf2xKLaRldJVULioggvkJvggZ3VXNNSRkCddE6D+BUI4HEIZIA2OjwIvg==",
+          "version": "1.37.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.37.0.tgz",
+          "integrity": "sha512-R3C4db6bgQhlIhPU48fUtdVmKnflq+hRdad7IyKhtFj06VPNVdk2RhiYL3UjQIlso8L+YxAtFkobT0VK+S/ybg==",
           "dev": true
         },
         "mime-types": {
-          "version": "2.1.19",
-          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.19.tgz",
-          "integrity": "sha512-P1tKYHVSZ6uFo26mtnve4HQFE3koh1UWVkp8YUC+ESBHe945xWSoXuHHiGarDqcEZ+whpCDnlNw5LON0kLo+sw==",
+          "version": "2.1.21",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.21.tgz",
+          "integrity": "sha512-3iL6DbwpyLzjR3xHSFNFeb9Nz/M8WDkX33t1GFQnFOllWk8pOrh/LSrB5OXlnlW5P9LH73X6loW/eogc+F5lJg==",
           "dev": true,
           "requires": {
-            "mime-db": "~1.35.0"
+            "mime-db": "~1.37.0"
           }
         }
       }
@@ -344,7 +344,6 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
-      "optional": true,
       "requires": {
         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -447,9 +446,9 @@
       "dev": true
     },
     "arraybuffer.slice": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco="
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
+      "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
     },
     "arrify": {
       "version": "1.0.1",
@@ -967,9 +966,9 @@
       }
     },
     "blob": {
-      "version": "0.0.4",
-      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
-      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE="
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
+      "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
     },
     "bluebird": {
       "version": "3.5.2",
@@ -1236,9 +1235,9 @@
       "dev": true
     },
     "cached-path-relative": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/cached-path-relative/-/cached-path-relative-1.0.1.tgz",
-      "integrity": "sha1-0JxLUoAKpMB44t2BqGmqyQ0uVOc=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/cached-path-relative/-/cached-path-relative-1.0.2.tgz",
+      "integrity": "sha512-5r2GqsoEb4qMTTN9J+WzXfjov+hjxT+j3u5K+kIVNIwAd99DLCJE9pBIMP1qVeybV6JiijL385Oz0DcYxfbOIg==",
       "dev": true
     },
     "caller-path": {
@@ -1651,9 +1650,9 @@
       "dev": true
     },
     "debug": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.0.1.tgz",
-      "integrity": "sha512-K23FHJ/Mt404FSlp6gSZCevIbTMLX0j3fmHhUEhQ3Wq0FMODW3+cUSoLdy1Gx4polAf4t/lphhmHH35BB8cLYw==",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.0.tgz",
+      "integrity": "sha512-heNPJUJIqC+xB6ayLAMHaIrmN9HKa7aQO8MGqKpvCA+uJYVcvR6l5kgdrhRuwPFHU7P5/A1w0BjByPHwpfTDKg==",
       "requires": {
         "ms": "^2.1.1"
       },
@@ -1824,9 +1823,9 @@
       }
     },
     "engine.io": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.2.0.tgz",
-      "integrity": "sha512-mRbgmAtQ4GAlKwuPnnAvXXwdPhEx+jkc0OBCLrXuD/CRvwNK3AxRSnqK4FSqmAMRRHryVJP8TopOvmEaA64fKw==",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.3.2.tgz",
+      "integrity": "sha512-AsaA9KG7cWPXWHp5FvHdDWY3AMWeZ8x+2pUVLcn71qE5AtAzgGbxuclOytygskw8XGmiQafTmnI9Bix3uihu2w==",
       "dev": true,
       "requires": {
         "accepts": "~1.3.4",
@@ -1834,7 +1833,7 @@
         "cookie": "0.3.1",
         "debug": "~3.1.0",
         "engine.io-parser": "~2.1.0",
-        "ws": "~3.3.1"
+        "ws": "~6.1.0"
       },
       "dependencies": {
         "debug": {
@@ -1849,9 +1848,9 @@
       }
     },
     "engine.io-client": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.2.1.tgz",
-      "integrity": "sha512-y5AbkytWeM4jQr7m/koQLc5AxpRKC1hEVUb/s1FUAWEJq5AzJJ4NLvzuKPuxtDi5Mq755WuDvZ6Iv2rXj4PTzw==",
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.3.1.tgz",
+      "integrity": "sha512-q66JBFuQcy7CSlfAz9L3jH+v7DTT3i6ZEadYcVj2pOs8/0uJHLxKX3WBkGTvULJMdz0tUCyJag0aKT/dpXL9BQ==",
       "requires": {
         "component-emitter": "1.2.1",
         "component-inherit": "0.0.3",
@@ -1861,7 +1860,7 @@
         "indexof": "0.0.1",
         "parseqs": "0.0.5",
         "parseuri": "0.0.5",
-        "ws": "~3.3.1",
+        "ws": "~6.1.0",
         "xmlhttprequest-ssl": "~1.5.4",
         "yeast": "0.1.2"
       },
@@ -1873,33 +1872,18 @@
           "requires": {
             "ms": "2.0.0"
           }
-        },
-        "safe-buffer": {
-          "version": "5.1.2",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
-        },
-        "ws": {
-          "version": "3.3.3",
-          "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
-          "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
-          "requires": {
-            "async-limiter": "~1.0.0",
-            "safe-buffer": "~5.1.0",
-            "ultron": "~1.1.0"
-          }
         }
       }
     },
     "engine.io-parser": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.1.tgz",
-      "integrity": "sha1-4Ps/DgRi9/WLt3waUun1p+JuRmg=",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.3.tgz",
+      "integrity": "sha512-6HXPre2O4Houl7c4g7Ic/XzPnHBvaEmN90vtRO9uLmwtRqQmTOw0QMevL1TOfL2Cpu1VzsaTmMotQgMdkzGkVA==",
       "requires": {
         "after": "0.8.2",
-        "arraybuffer.slice": "0.0.6",
+        "arraybuffer.slice": "~0.0.7",
         "base64-arraybuffer": "0.1.5",
-        "blob": "0.0.4",
+        "blob": "0.0.5",
         "has-binary2": "~1.0.2"
       }
     },
@@ -2677,9 +2661,9 @@
       }
     },
     "has-binary2": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/has-binary2/-/has-binary2-1.0.2.tgz",
-      "integrity": "sha1-6D26SfC5vk0CbSc2U1DZ8D9Uvpg=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has-binary2/-/has-binary2-1.0.3.tgz",
+      "integrity": "sha512-G1LWKhDSvhGeAQ8mPVQlqNcOB2sJdwATtZKl2pDKKHfpf/rYj24lkinxf69blJbnsvtqqNU+L3SL50vzZhXOnw==",
       "requires": {
         "isarray": "2.0.1"
       }
@@ -3204,7 +3188,6 @@
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
       "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
       "dev": true,
-      "optional": true,
       "requires": {
         "is-buffer": "^1.1.5"
       }
@@ -3353,8 +3336,7 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "loose-envify": {
       "version": "1.4.0",
@@ -4304,8 +4286,7 @@
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-1.6.1.tgz",
       "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "request": {
       "version": "2.88.0",
@@ -4561,28 +4542,17 @@
       }
     },
     "socket.io": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-2.1.1.tgz",
-      "integrity": "sha512-rORqq9c+7W0DAK3cleWNSyfv/qKXV99hV4tZe+gGLfBECw3XEhBy7x85F3wypA9688LKjtwO9pX9L33/xQI8yA==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-2.2.0.tgz",
+      "integrity": "sha512-wxXrIuZ8AILcn+f1B4ez4hJTPG24iNgxBBDaJfT6MsyOhVYiTXWexGoPkd87ktJG8kQEcL/NBvRi64+9k4Kc0w==",
       "dev": true,
       "requires": {
-        "debug": "~3.1.0",
-        "engine.io": "~3.2.0",
+        "debug": "~4.1.0",
+        "engine.io": "~3.3.1",
         "has-binary2": "~1.0.2",
         "socket.io-adapter": "~1.1.0",
-        "socket.io-client": "2.1.1",
-        "socket.io-parser": "~3.2.0"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "3.1.0",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
-          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
-          "dev": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
-        }
+        "socket.io-client": "2.2.0",
+        "socket.io-parser": "~3.3.0"
       }
     },
     "socket.io-adapter": {
@@ -4592,23 +4562,23 @@
       "dev": true
     },
     "socket.io-client": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.1.1.tgz",
-      "integrity": "sha512-jxnFyhAuFxYfjqIgduQlhzqTcOEQSn+OHKVfAxWaNWa7ecP7xSNk2Dx/3UEsDcY7NcFafxvNvKPmmO7HTwTxGQ==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.2.0.tgz",
+      "integrity": "sha512-56ZrkTDbdTLmBIyfFYesgOxsjcLnwAKoN4CiPyTVkMQj3zTUh0QAx3GbvIvLpFEOvQWu92yyWICxB0u7wkVbYA==",
       "requires": {
         "backo2": "1.0.2",
         "base64-arraybuffer": "0.1.5",
         "component-bind": "1.0.0",
         "component-emitter": "1.2.1",
         "debug": "~3.1.0",
-        "engine.io-client": "~3.2.0",
+        "engine.io-client": "~3.3.1",
         "has-binary2": "~1.0.2",
         "has-cors": "1.1.0",
         "indexof": "0.0.1",
         "object-component": "0.0.3",
         "parseqs": "0.0.5",
         "parseuri": "0.0.5",
-        "socket.io-parser": "~3.2.0",
+        "socket.io-parser": "~3.3.0",
         "to-array": "0.1.4"
       },
       "dependencies": {
@@ -4619,24 +4589,13 @@
           "requires": {
             "ms": "2.0.0"
           }
-        },
-        "socket.io-parser": {
-          "version": "3.2.0",
-          "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.2.0.tgz",
-          "integrity": "sha512-FYiBx7rc/KORMJlgsXysflWx/RIvtqZbyGLlHZvjfmPTPeuD/I8MaW7cfFrj5tRltICJdgwflhfZ3NVVbVLFQA==",
-          "requires": {
-            "component-emitter": "1.2.1",
-            "debug": "~3.1.0",
-            "isarray": "2.0.1"
-          }
         }
       }
     },
     "socket.io-parser": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.2.0.tgz",
-      "integrity": "sha512-FYiBx7rc/KORMJlgsXysflWx/RIvtqZbyGLlHZvjfmPTPeuD/I8MaW7cfFrj5tRltICJdgwflhfZ3NVVbVLFQA==",
-      "dev": true,
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.3.0.tgz",
+      "integrity": "sha512-hczmV6bDgdaEbVqhAeVMM/jfUfzuEZHsQg6eOmLgJht6G3mPKMxYm75w2+qhAQZ+4X+1+ATZ+QFKeOZD5riHng==",
       "requires": {
         "component-emitter": "1.2.1",
         "debug": "~3.1.0",
@@ -4647,7 +4606,6 @@
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
           "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
-          "dev": true,
           "requires": {
             "ms": "2.0.0"
           }
@@ -5078,11 +5036,6 @@
       "dev": true,
       "optional": true
     },
-    "ultron": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.0.tgz",
-      "integrity": "sha1-sHoualQagV/Go0zNRTO67DB8qGQ="
-    },
     "umd": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/umd/-/umd-3.0.3.tgz",
@@ -5255,22 +5208,11 @@
       }
     },
     "ws": {
-      "version": "3.3.3",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
-      "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
-      "dev": true,
+      "version": "6.1.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.1.2.tgz",
+      "integrity": "sha512-rfUqzvz0WxmSXtJpPMX2EeASXabOrSMk1ruMOV3JBTBjo4ac2lDjGGsbQSyxj8Odhw5fBib8ZKEjDNvgouNKYw==",
       "requires": {
-        "async-limiter": "~1.0.0",
-        "safe-buffer": "~5.1.0",
-        "ultron": "~1.1.0"
-      },
-      "dependencies": {
-        "safe-buffer": {
-          "version": "5.1.2",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
-          "dev": true
-        }
+        "async-limiter": "~1.0.0"
       }
     },
     "xml": {
diff --git a/package.json b/package.json
index dc75e25..8367b54 100644
--- a/package.json
+++ b/package.json
@@ -32,10 +32,10 @@
   "dependencies": {
     "axios": "^0.18.0",
     "bluebird": "^3.5.2",
-    "debug": "^4.0.1",
+    "debug": "^4.1.0",
     "invariant": "^2.2.4",
     "lodash": "^4.17.11",
-    "socket.io-client": "^2.1.1"
+    "socket.io-client": "^2.2.0"
   },
   "devDependencies": {
     "babel-helper-evaluate-path": "^0.5.0",
@@ -62,6 +62,6 @@
     "mocha-headless-chrome": "^2.0.0",
     "moxios": "^0.4.0",
     "sinon": "^6.3.4",
-    "socket.io": "^2.1.1"
+    "socket.io": "^2.2.0"
   }
 }
diff --git a/sample/login.js b/sample/login.js
index bfdcbdc..e73b487 100644
--- a/sample/login.js
+++ b/sample/login.js
@@ -2,10 +2,19 @@ const {Authentication, Transport} = require('../src');
 
 const transport = new Transport('http://localhost:3000');
 const auth = new Authentication(transport);
-auth.loginWithToken(process.env.GITHUB_ACCESS_TOKEN)
+const token = process.env.GITHUB_ACCESS_TOKEN;
+const email = process.argv[1];
+const password = process.argv[2];
+let login;
+if (token) {
+  login = auth.loginWithToken(token);
+} else {
+  login = auth.login(email, password);
+}
+login
   .then(() => {
-    console.log('login success');
+    console.log(`login success, token: ${transport.token}`);
   })
   .catch((error) => {
     console.error(`login fails: ${error}`);
-  })
+  });