diff --git a/.eslintrc.js b/.eslintrc.js
index b9d4a0c..e71f496 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -3,6 +3,7 @@ module.exports = {
     node: true,
     commonjs: true,
     es6: true,
+    mocha: true,
   },
   extends: "eslint:recommended",
   globals: {
diff --git a/.mocharc.js b/.mocharc.js
new file mode 100644
index 0000000..b25de94
--- /dev/null
+++ b/.mocharc.js
@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = {
+  spec: "test/**/*.test.js",
+};
diff --git a/package-lock.json b/package-lock.json
index 2ce3497..ce37f9a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,12 +13,306 @@
         "@babel/highlight": "^7.8.3"
       }
     },
+    "@babel/compat-data": {
+      "version": "7.15.0",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.15.0.tgz",
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+      "dev": true
+    },
+    "@babel/core": {
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+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.15.5.tgz",
+      "integrity": "sha512-pYgXxiwAgQpgM1bNkZsDEq85f0ggXMA5L7c+o3tskGMh2BunCI9QUwB9Z4jpvXUOuMdyGKiGKQiRe11VS6Jzvg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.14.5",
+        "@babel/generator": "^7.15.4",
+        "@babel/helper-compilation-targets": "^7.15.4",
+        "@babel/helper-module-transforms": "^7.15.4",
+        "@babel/helpers": "^7.15.4",
+        "@babel/parser": "^7.15.5",
+        "@babel/template": "^7.15.4",
+        "@babel/traverse": "^7.15.4",
+        "@babel/types": "^7.15.4",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.2",
+        "json5": "^2.1.2",
+        "semver": "^6.3.0",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.14.5.tgz",
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+          "dev": true,
+          "requires": {
+            "@babel/highlight": "^7.14.5"
+          }
+        },
+        "@babel/helper-validator-identifier": {
+          "version": "7.14.9",
+          "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.14.9.tgz",
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+          "dev": true
+        },
+        "@babel/highlight": {
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+          "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.14.5.tgz",
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+          "requires": {
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+            "chalk": "^2.0.0",
+            "js-tokens": "^4.0.0"
+          }
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+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
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+          "dev": true,
+          "requires": {
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+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
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+          "dev": true,
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+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.15.4.tgz",
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+        }
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+      }
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+        "@babel/helper-split-export-declaration": "^7.15.4",
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+        "@babel/template": "^7.15.4",
+        "@babel/traverse": "^7.15.4",
+        "@babel/types": "^7.15.4"
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+        "@babel/types": "^7.15.4"
+      }
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+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.15.4"
+      }
+    },
+    "@babel/helper-split-export-declaration": {
+      "version": "7.15.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.15.4.tgz",
+      "integrity": "sha512-HsFqhLDZ08DxCpBdEVtKmywj6PQbwnF6HHybur0MAnkAKnlS6uHkwnmRIkElB2Owpfb4xL4NwDmDLFubueDXsw==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.15.4"
+      }
+    },
     "@babel/helper-validator-identifier": {
       "version": "7.9.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.9.5.tgz",
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       "dev": true
     },
+    "@babel/helper-validator-option": {
+      "version": "7.14.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-option/-/helper-validator-option-7.14.5.tgz",
+      "integrity": "sha512-OX8D5eeX4XwcroVW45NMvoYaIuFI+GQpA2a8Gi+X/U/cDUIRsV37qQfF905F0htTRCREQIB4KqPeaveRJUl3Ow==",
+      "dev": true
+    },
+    "@babel/helpers": {
+      "version": "7.15.4",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.15.4.tgz",
+      "integrity": "sha512-V45u6dqEJ3w2rlryYYXf6i9rQ5YMNu4FLS6ngs8ikblhu2VdR1AqAd6aJjBzmf2Qzh6KOLqKHxEN9+TFbAkAVQ==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.15.4",
+        "@babel/traverse": "^7.15.4",
+        "@babel/types": "^7.15.4"
+      }
+    },
     "@babel/highlight": {
       "version": "7.9.0",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.9.0.tgz",
@@ -82,6 +376,12 @@
         }
       }
     },
+    "@babel/parser": {
+      "version": "7.15.6",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.15.6.tgz",
+      "integrity": "sha512-S/TSCcsRuCkmpUuoWijua0Snt+f3ewU/8spLo+4AXJCZfT0bVCzLD5MuOKdrx0mlAptbKzn5AdgEIIKXxXkz9Q==",
+      "dev": true
+    },
     "@babel/runtime": {
       "version": "7.9.2",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.9.2.tgz",
@@ -91,6 +391,275 @@
         "regenerator-runtime": "^0.13.4"
       }
     },
+    "@babel/template": {
+      "version": "7.15.4",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.15.4.tgz",
+      "integrity": "sha512-UgBAfEa1oGuYgDIPM2G+aHa4Nlo9Lh6mGD2bDBGMTbYnc38vulXPuC1MGjYILIEmlwl6Rd+BPR9ee3gm20CBtg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.14.5",
+        "@babel/parser": "^7.15.4",
+        "@babel/types": "^7.15.4"
+      },
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+          "version": "7.14.5",
+          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.14.5.tgz",
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+          "dev": true,
+          "requires": {
+            "@babel/highlight": "^7.14.5"
+          }
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+      }
+    },
     "range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -4520,6 +6280,15 @@
         "rc": "^1.2.8"
       }
     },
+    "release-zalgo": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/release-zalgo/-/release-zalgo-1.0.0.tgz",
+      "integrity": "sha1-CXALflB0Mpc5Mw5TXFqQ+2eFFzA=",
+      "dev": true,
+      "requires": {
+        "es6-error": "^4.0.1"
+      }
+    },
     "require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -4805,6 +6574,15 @@
       "resolved": "https://registry.npmjs.org/sequelize-pool/-/sequelize-pool-2.3.0.tgz",
       "integrity": "sha512-Ibz08vnXvkZ8LJTiUOxRcj1Ckdn7qafNZ2t59jYHMX1VIebTAOYefWdRYFt6z6+hy52WGthAHAoLc9hvk3onqA=="
     },
+    "serialize-javascript": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-6.0.0.tgz",
+      "integrity": "sha512-Qr3TosvguFt8ePWqsvRfrKyQXIiW+nGbYpy8XK24NQHE83caxWt+mIymTT19DGFbNWNLfEwsrkSmN64lVWB9ag==",
+      "dev": true,
+      "requires": {
+        "randombytes": "^2.1.0"
+      }
+    },
     "serve-static": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz",
@@ -4846,6 +6624,16 @@
       "resolved": "https://registry.npmjs.org/shimmer/-/shimmer-1.2.1.tgz",
       "integrity": "sha512-sQTKC1Re/rM6XyFM6fIAGHRPVGvyXfgzIDvzoq608vM+jeyVD0Tu1E6Np0Kc2zAIFWIj963V2800iF/9LPieQw=="
     },
+    "side-channel": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.4.tgz",
+      "integrity": "sha512-q5XPytqFEIKHkGdiMIrY10mvLRvnQh42/+GoBlFW3b2LXLE2xxJpZFdm94we0BaoV3RwJyGqg5wS7epxTv0Zvw==",
+      "requires": {
+        "call-bind": "^1.0.0",
+        "get-intrinsic": "^1.0.2",
+        "object-inspect": "^1.9.0"
+      }
+    },
     "sigmund": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
@@ -4857,6 +6645,37 @@
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.3.tgz",
       "integrity": "sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA=="
     },
+    "sinon": {
+      "version": "11.1.2",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-11.1.2.tgz",
+      "integrity": "sha512-59237HChms4kg7/sXhiRcUzdSkKuydDeTiamT/jesUVHshBgL8XAmhgFo0GfK6RruMDM/iRSij1EybmMog9cJw==",
+      "dev": true,
+      "requires": {
+        "@sinonjs/commons": "^1.8.3",
+        "@sinonjs/fake-timers": "^7.1.2",
+        "@sinonjs/samsam": "^6.0.2",
+        "diff": "^5.0.0",
+        "nise": "^5.1.0",
+        "supports-color": "^7.2.0"
+      },
+      "dependencies": {
+        "supports-color": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
+      }
+    },
+    "sinon-chai": {
+      "version": "3.7.0",
+      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-3.7.0.tgz",
+      "integrity": "sha512-mf5NURdUaSdnatJx3uhoBOrY9dtL19fiOtAdT1Azxg3+lNJFiuN0uzaU3xX1LeAfL17kHQhTAJgpsfhbMJMY2g==",
+      "dev": true
+    },
     "slash": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
@@ -4955,6 +6774,40 @@
         "source-map": "^0.6.0"
       }
     },
+    "spawn-wrap": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-2.0.0.tgz",
+      "integrity": "sha512-EeajNjfN9zMnULLwhZZQU3GWBoFNkbngTUPfaawT4RkMiviTxcX0qfhVbGey39mfctfDHkWtuecgQ8NJcyQWHg==",
+      "dev": true,
+      "requires": {
+        "foreground-child": "^2.0.0",
+        "is-windows": "^1.0.2",
+        "make-dir": "^3.0.0",
+        "rimraf": "^3.0.0",
+        "signal-exit": "^3.0.2",
+        "which": "^2.0.1"
+      },
+      "dependencies": {
+        "rimraf": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+          "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
+          "dev": true,
+          "requires": {
+            "glob": "^7.1.3"
+          }
+        },
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "sprintf-js": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.2.tgz",
@@ -4980,41 +6833,21 @@
       }
     },
     "string.prototype.trimend": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/string.prototype.trimend/-/string.prototype.trimend-1.0.1.tgz",
-      "integrity": "sha512-LRPxFUaTtpqYsTeNKaFOw3R4bxIzWOnbQ837QfBylo8jIxtcbK/A/sMV7Q+OAV/vWo+7s25pOE10KYSjaSO06g==",
-      "requires": {
-        "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.5"
-      }
-    },
-    "string.prototype.trimleft": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/string.prototype.trimleft/-/string.prototype.trimleft-2.1.2.tgz",
-      "integrity": "sha512-gCA0tza1JBvqr3bfAIFJGqfdRTyPae82+KTnm3coDXkZN9wnuW3HjGgN386D7hfv5CHQYCI022/rJPVlqXyHSw==",
-      "requires": {
-        "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.5",
-        "string.prototype.trimstart": "^1.0.0"
-      }
-    },
-    "string.prototype.trimright": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/string.prototype.trimright/-/string.prototype.trimright-2.1.2.tgz",
-      "integrity": "sha512-ZNRQ7sY3KroTaYjRS6EbNiiHrOkjihL9aQE/8gfQ4DtAC/aEBRHFJa44OmoWxGGqXuJlfKkZW4WcXErGr+9ZFg==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimend/-/string.prototype.trimend-1.0.4.tgz",
+      "integrity": "sha512-y9xCjw1P23Awk8EvTpcyL2NIr1j7wJ39f+k6lvRnSMz+mz9CGz9NYPelDk42kOz6+ql8xjfK8oYzy3jAP5QU5A==",
       "requires": {
-        "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.5",
-        "string.prototype.trimend": "^1.0.0"
+        "call-bind": "^1.0.2",
+        "define-properties": "^1.1.3"
       }
     },
     "string.prototype.trimstart": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/string.prototype.trimstart/-/string.prototype.trimstart-1.0.1.tgz",
-      "integrity": "sha512-XxZn+QpvrBI1FOcg6dIpxUPgWCPuNXvMD72aaRaUQv1eD4e/Qy8i/hFTe0BUmD60p/QA6bh1avmuPTfNjqVWRw==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimstart/-/string.prototype.trimstart-1.0.4.tgz",
+      "integrity": "sha512-jh6e984OBfvxS50tdY2nRZnoC5/mLFKOREQfw8t5yytkoUsJRNxvI/E39qu1sD0OtWI3OC0XgKSmcWwziwYuZw==",
       "requires": {
-        "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.5"
+        "call-bind": "^1.0.2",
+        "define-properties": "^1.1.3"
       }
     },
     "string_decoder": {
@@ -5030,6 +6863,12 @@
         "ansi-regex": "^3.0.0"
       }
     },
+    "strip-bom": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-4.0.0.tgz",
+      "integrity": "sha512-3xurFv5tEgii33Zi8Jtp55wEIILR9eh34FAW00PZf+JnSsTmV/ioewSgQl97JHvgjoRGwPShsWm+IdrxB35d0w==",
+      "dev": true
+    },
     "strip-final-newline": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/strip-final-newline/-/strip-final-newline-2.0.0.tgz",
@@ -5378,6 +7217,33 @@
       "integrity": "sha512-a6sumDlzyHVJWb8+YofY4TW112G6p2FCPEAFk+59gIYHv3XHRhm9ltVQ9kli4hNWeQBwSpe8cRN25x0ROunMOw==",
       "dev": true
     },
+    "test-exclude": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
+      "integrity": "sha512-cAGWPIyOHU6zlmg88jwm7VRyXnMN7iV68OGAbYDk/Mh/xC/pzVPlQtY6ngoIH/5/tciuhGfvESU8GrHrcxD56w==",
+      "dev": true,
+      "requires": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^7.1.4",
+        "minimatch": "^3.0.4"
+      },
+      "dependencies": {
+        "glob": {
+          "version": "7.1.7",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.7.tgz",
+          "integrity": "sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
+          }
+        }
+      }
+    },
     "text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -5422,6 +7288,12 @@
         "os-tmpdir": "~1.0.2"
       }
     },
+    "to-fast-properties": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-2.0.0.tgz",
+      "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=",
+      "dev": true
+    },
     "to-readable-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/to-readable-stream/-/to-readable-stream-1.0.0.tgz",
@@ -5490,6 +7362,12 @@
         "prelude-ls": "~1.1.2"
       }
     },
+    "type-detect": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
+      "dev": true
+    },
     "type-fest": {
       "version": "0.8.1",
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
@@ -5523,6 +7401,17 @@
         "bluebird": "^3.7.2"
       }
     },
+    "unbox-primitive": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/unbox-primitive/-/unbox-primitive-1.0.1.tgz",
+      "integrity": "sha512-tZU/3NqK3dA5gpE1KtyiJUrEB0lxnGkMFHptJ7q6ewdZ8s12QrODwNbhIJStmJkd1QDXa1NRA8aF2A1zk/Ypyw==",
+      "requires": {
+        "function-bind": "^1.1.1",
+        "has-bigints": "^1.0.1",
+        "has-symbols": "^1.0.2",
+        "which-boxed-primitive": "^1.0.2"
+      }
+    },
     "undefsafe": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.3.tgz",
@@ -5699,6 +7588,18 @@
         "isexe": "^2.0.0"
       }
     },
+    "which-boxed-primitive": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz",
+      "integrity": "sha512-bwZdv0AKLpplFY2KZRX6TvyuN7ojjr7lwkg6ml0roIy9YeuSr7JS372qlNW18UQYzgYK9ziGcerWqZOmEn9VNg==",
+      "requires": {
+        "is-bigint": "^1.0.1",
+        "is-boolean-object": "^1.1.0",
+        "is-number-object": "^1.0.4",
+        "is-string": "^1.0.5",
+        "is-symbol": "^1.0.3"
+      }
+    },
     "which-module": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
@@ -5780,6 +7681,12 @@
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
       "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ=="
     },
+    "workerpool": {
+      "version": "6.1.5",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.1.5.tgz",
+      "integrity": "sha512-XdKkCK0Zqc6w3iTxLckiuJ81tiD/o5rBE/m+nXpRCB+/Sq4DqkfXZ/x0jW02DG1tGsfUGXbTJyZDP+eu67haSw==",
+      "dev": true
+    },
     "wrap-ansi": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
@@ -5969,14 +7876,36 @@
       }
     },
     "yargs-unparser": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
-      "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
+      "integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
+      "dev": true,
       "requires": {
-        "flat": "^4.1.0",
-        "lodash": "^4.17.15",
-        "yargs": "^13.3.0"
+        "camelcase": "^6.0.0",
+        "decamelize": "^4.0.0",
+        "flat": "^5.0.2",
+        "is-plain-obj": "^2.1.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.2.0.tgz",
+          "integrity": "sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==",
+          "dev": true
+        },
+        "decamelize": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-4.0.0.tgz",
+          "integrity": "sha512-9iE1PgSik9HeIIw2JO94IidnE3eBoQrFJ3w7sFuzSX4DpmZ3v5sZpUiV5Swcf6mQEF+Y0ru8Neo+p+nyh2J+hQ==",
+          "dev": true
+        }
       }
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index 0029ddb..baa77ee 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
     "start-server": "./node_modules/pm2/bin/pm2 start server.js",
     "stop-server": "./node_modules/pm2/bin/pm2 stop server.js",
     "logs": "./node_modules/pm2/bin/pm2 logs",
-    "test": "npm run test",
+    "test": "mocha test --timeout 10000",
+    "coverage": "nyc --reporter=html npm run test",
     "lint": "npx eslint .",
     "prettier": "npx prettier -c .",
     "db:migrate": "npx sequelize db:migrate",
@@ -19,6 +20,7 @@
   "license": "ISC",
   "dependencies": {
     "auth0": "^2.30.0",
+    "axios": "^0.21.4",
     "bunyan": "^1.8.12",
     "convict": "^5.2.0",
     "cors": "^2.8.5",
@@ -32,13 +34,18 @@
     "sequelize": "^5.21.7"
   },
   "devDependencies": {
+    "chai": "^4.3.4",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.11.0",
     "husky": "^4.2.5",
+    "mocha": "^9.1.1",
+    "nodemon": "^2.0.3",
+    "nyc": "^15.1.0",
     "prettier": "2.0.5",
     "pretty-quick": "^2.0.1",
     "sequelize-cli": "^5.5.1",
-    "nodemon": "^2.0.3"
+    "sinon": "^11.1.2",
+    "sinon-chai": "^3.7.0"
   },
   "husky": {
     "hooks": {
diff --git a/test/controllers/index.test.js b/test/controllers/index.test.js
new file mode 100644
index 0000000..e69de29
diff --git a/test/utils/index.test.js b/test/utils/index.test.js
new file mode 100644
index 0000000..eb9d380
--- /dev/null
+++ b/test/utils/index.test.js
@@ -0,0 +1,41 @@
+const axios = require("axios");
+const chai = require("chai");
+const { expect } = chai;
+const sinon = require("sinon");
+const sinonChai = require("sinon-chai");
+
+const { isEmailValid } = require("../../utils");
+const { getUserCompany } = require("../../utils/user");
+
+chai.use(sinonChai);
+
+describe("Validation", function () {
+  it("should validate email", function () {
+    const result = isEmailValid("abc@example.com");
+    expect(result).to.be.eq(true);
+  });
+});
+
+describe("User data", function () {
+  const sandbox = sinon.createSandbox();
+
+  afterEach(function () {
+    sandbox.restore();
+  });
+  it("should return user company", function (done) {
+    const getStub = sandbox
+      .stub(axios, "get")
+      .resolves({ data: { company: "Productbox" } });
+    getUserCompany("mhassanrahi")
+      .then(function (result) {
+        expect(result.data.company).to.be.a.string;
+        expect(result.data.company).to.be.eq("Productbox");
+        expect(getStub).to.have.been.calledOnce;
+        expect(getStub).to.have.been.calledWith(
+          "https://api.github.com/users/mhassanrahi"
+        );
+        done();
+      })
+      .catch(done);
+  });
+});
diff --git a/utils/user.js b/utils/user.js
new file mode 100644
index 0000000..263349c
--- /dev/null
+++ b/utils/user.js
@@ -0,0 +1,6 @@
+const axios = require("axios");
+module.exports = {
+  getUserCompany: (username) => {
+    return axios.get(`https://api.github.com/users/${username}`);
+  },
+};