changed to async-await style for getting API data

Ravi Srinivasan

2019-09-10 6e34dbf6a69e9538fbf4f55d4f28da7fa7a810e6

changed to async-await style for getting API data

 weather/package-lock.json

@@ -17,6 +17,14 @@
        "@types/babel-types": "*"
      }
    },
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      "resolved": "https://registry.npmjs.org/abs/-/abs-1.3.13.tgz",
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      "requires": {
        "ul": "^5.0.0"
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    },
    "accepts": {
      "version": "1.3.7",
      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
@@ -46,17 +54,6 @@
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      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
      "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
      "requires": {
        "fast-deep-equal": "^2.0.1",
        "fast-json-stable-stringify": "^2.0.0",
        "json-schema-traverse": "^0.4.1",
        "uri-js": "^4.2.2"
      }
    },
    "align-text": {
      "version": "0.1.4",
      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
@@ -81,34 +78,6 @@
      "version": "2.0.6",
      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
    },
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      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
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      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
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      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
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      "version": "1.8.0",
      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
    },
    "babel-runtime": {
      "version": "6.26.0",
@@ -143,14 +112,6 @@
        "safe-buffer": "5.1.2"
      }
    },
    "bcrypt-pbkdf": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
      "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
      "requires": {
        "tweetnacl": "^0.14.3"
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      "version": "1.18.3",
      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
@@ -178,10 +139,10 @@
      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
      "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk="
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      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
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      "resolved": "https://registry.npmjs.org/capture-stack-trace/-/capture-stack-trace-1.0.1.tgz",
      "integrity": "sha512-mYQLZnx5Qt1JgB1WEiMCf2647plpGeQ2NMR/5L0HNZzGQo4fuSPnK+wjfPnKZV0aiJDgzmWqqkV/g7JD+DW0qw=="
    },
    "center-align": {
      "version": "0.1.3",
@@ -217,14 +178,6 @@
        "center-align": "^0.1.1",
        "right-align": "^0.1.1",
        "wordwrap": "0.0.2"
      }
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    "combined-stream": {
      "version": "1.0.8",
      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
      "requires": {
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    "commander": {
@@ -285,12 +238,12 @@
      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
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      "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
    "create-error-class": {
      "version": "3.0.2",
      "resolved": "https://registry.npmjs.org/create-error-class/-/create-error-class-3.0.2.tgz",
      "integrity": "sha1-Br56vvlHo/FKMP1hBnHUAbyot7Y=",
      "requires": {
        "assert-plus": "^1.0.0"
        "capture-stack-trace": "^1.0.0"
      }
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    "debug": {
@@ -306,10 +259,18 @@
      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
    },
    "delayed-stream": {
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      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
    "deep-extend": {
      "version": "0.6.0",
      "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
      "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA=="
    },
    "deffy": {
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      "resolved": "https://registry.npmjs.org/deffy/-/deffy-2.2.3.tgz",
      "integrity": "sha512-c5JD8Z6V1aBWVzn1+aELL97R1pHCwEjXeU3hZXdigkZkxb9vhgFP162kAxGXl992TtAg0btwQyx7d54CqcQaXQ==",
      "requires": {
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      }
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    "depd": {
      "version": "1.1.2",
@@ -331,13 +292,12 @@
      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-8.1.0.tgz",
      "integrity": "sha512-GUE3gqcDCaMltj2++g6bRQ5rBJWtkWTmqmD0fo1RnnMuUqHNCt2oTPeDnS9n6fKYvlhn7AeBkb38lymBtWBQdA=="
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      "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
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      "integrity": "sha1-ixLauHjA1p4+eJEFFmKjL8a93ME=",
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@@ -349,6 +309,22 @@
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      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
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@@ -364,6 +340,15 @@
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@@ -402,26 +387,6 @@
        "vary": "~1.1.2"
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@@ -434,21 +399,6 @@
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    "forwarded": {
@@ -466,12 +416,75 @@
      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A=="
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@@ -501,6 +511,11 @@
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@@ -510,16 +525,6 @@
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      "requires": {
        "rc": "^1.1.6",
        "safe-buffer": "^5.0.1"
      }
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      "version": "3.1.0",
      "resolved": "https://registry.npmjs.org/registry-url/-/registry-url-3.1.0.tgz",
      "integrity": "sha1-PU74cPc93h138M+aOBQyRE4XSUI=",
      "requires": {
        "rc": "^1.0.1"
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      "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-1.6.1.tgz",
      "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc="
    },
    "request": {
      "version": "2.88.0",
      "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
      "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
      "requires": {
        "aws-sign2": "~0.7.0",
        "aws4": "^1.8.0",
        "caseless": "~0.12.0",
        "combined-stream": "~1.0.6",
        "extend": "~3.0.2",
        "forever-agent": "~0.6.1",
        "form-data": "~2.3.2",
        "har-validator": "~5.1.0",
        "http-signature": "~1.2.0",
        "is-typedarray": "~1.0.0",
        "isstream": "~0.1.2",
        "json-stringify-safe": "~5.0.1",
        "mime-types": "~2.1.19",
        "oauth-sign": "~0.9.0",
        "performance-now": "^2.1.0",
        "qs": "~6.5.2",
        "safe-buffer": "^5.1.2",
        "tough-cookie": "~2.4.3",
        "tunnel-agent": "^0.6.0",
        "uuid": "^3.3.2"
      }
    },
    "resolve": {
      "version": "1.12.0",
@@ -974,6 +1148,11 @@
      "version": "2.1.2",
      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
    },
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      "version": "5.7.1",
      "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
      "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
    },
    "send": {
      "version": "0.16.2",
@@ -1011,6 +1190,11 @@
      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.0.tgz",
      "integrity": "sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ=="
    },
    "sliced": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/sliced/-/sliced-1.0.1.tgz",
      "integrity": "sha1-CzpmK10Ewxd7GSa+qCsD+Dei70E="
    },
    "source-map": {
      "version": "0.4.4",
      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
@@ -1019,26 +1203,64 @@
        "amdefine": ">=0.0.4"
      }
    },
    "sshpk": {
      "version": "1.16.1",
      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
    "spdx-correct": {
      "version": "3.1.0",
      "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.0.tgz",
      "integrity": "sha512-lr2EZCctC2BNR7j7WzJ2FpDznxky1sjfxvvYEyzxNyb6lZXHODmEoJeFu4JupYlkfha1KZpJyoqiJ7pgA1qq8Q==",
      "requires": {
        "asn1": "~0.2.3",
        "assert-plus": "^1.0.0",
        "bcrypt-pbkdf": "^1.0.0",
        "dashdash": "^1.12.0",
        "ecc-jsbn": "~0.1.1",
        "getpass": "^0.1.1",
        "jsbn": "~0.1.0",
        "safer-buffer": "^2.0.2",
        "tweetnacl": "~0.14.0"
        "spdx-expression-parse": "^3.0.0",
        "spdx-license-ids": "^3.0.0"
      }
    },
    "spdx-exceptions": {
      "version": "2.2.0",
      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.2.0.tgz",
      "integrity": "sha512-2XQACfElKi9SlVb1CYadKDXvoajPgBVPn/gOQLrTvHdElaVhr7ZEbqJaRnJLVNeaI4cMEAgVCeBMKF6MWRDCRA=="
    },
    "spdx-expression-parse": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-3.0.0.tgz",
      "integrity": "sha512-Yg6D3XpRD4kkOmTpdgbUiEJFKghJH03fiC1OPll5h/0sO6neh2jqRDVHOQ4o/LMea0tgCkbMgea5ip/e+MkWyg==",
      "requires": {
        "spdx-exceptions": "^2.1.0",
        "spdx-license-ids": "^3.0.0"
      }
    },
    "spdx-license-ids": {
      "version": "3.0.5",
      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.5.tgz",
      "integrity": "sha512-J+FWzZoynJEXGphVIS+XEh3kFSjZX/1i9gFBaWQcB+/tmpe2qUsSBABpcxqxnAxFdiUFEgAX1bjYGQvIZmoz9Q=="
    },
    "statuses": {
      "version": "1.4.0",
      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.4.0.tgz",
      "integrity": "sha512-zhSCtt8v2NDrRlPQpCNtw/heZLtfUDqxBM1udqikb/Hbk52LK4nQSwr10u77iopCW5LsyHpuXS0GnEc48mLeew=="
    },
    "string_decoder": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
      "requires": {
        "safe-buffer": "~5.1.0"
      }
    },
    "strip-json-comments": {
      "version": "2.0.1",
      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
      "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
    },
    "timed-out": {
      "version": "3.1.3",
      "resolved": "https://registry.npmjs.org/timed-out/-/timed-out-3.1.3.tgz",
      "integrity": "sha1-lYYL/MXHbCd/j4Mm/Q9bLiDrohc="
    },
    "tmp": {
      "version": "0.0.28",
      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.28.tgz",
      "integrity": "sha1-Fyc1t/YU6nrzlmT6hM8N5OUV0SA=",
      "requires": {
        "os-tmpdir": "~1.0.1"
      }
    },
    "to-fast-properties": {
      "version": "1.0.3",
@@ -1050,35 +1272,6 @@
      "resolved": "https://registry.npmjs.org/token-stream/-/token-stream-0.0.1.tgz",
      "integrity": "sha1-zu78cXp2xDFvEm0LnbqlXX598Bo="
    },
    "tough-cookie": {
      "version": "2.4.3",
      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
      "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
      "requires": {
        "psl": "^1.1.24",
        "punycode": "^1.4.1"
      },
      "dependencies": {
        "punycode": {
          "version": "1.4.1",
          "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
          "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4="
        }
      }
    },
    "tunnel-agent": {
      "version": "0.6.0",
      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
      "requires": {
        "safe-buffer": "^5.0.1"
      }
    },
    "tweetnacl": {
      "version": "0.14.5",
      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
    },
    "type-is": {
      "version": "1.6.18",
      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
@@ -1086,6 +1279,14 @@
      "requires": {
        "media-typer": "0.3.0",
        "mime-types": "~2.1.24"
      }
    },
    "typpy": {
      "version": "2.3.11",
      "resolved": "https://registry.npmjs.org/typpy/-/typpy-2.3.11.tgz",
      "integrity": "sha512-Jh/fykZSaxeKO0ceMAs6agki9T5TNA9kiIR6fzKbvafKpIw8UlNlHhzuqKyi5lfJJ5VojJOx9tooIbyy7vHV/g==",
      "requires": {
        "function.name": "^1.0.3"
      }
    },
    "uglify-js": {
@@ -1111,43 +1312,56 @@
      "integrity": "sha1-bgkk1r2mta/jSeOabWMoUKD4grc=",
      "optional": true
    },
    "ul": {
      "version": "5.2.14",
      "resolved": "https://registry.npmjs.org/ul/-/ul-5.2.14.tgz",
      "integrity": "sha512-VaIRQZ5nkEd8VtI3OYo5qNbhHQuBtPtu5k5GrYaKCmcP1H+FkuWtS+XFTSU1oz5GiuAg2FJL5ka8ufr9zdm8eg==",
      "requires": {
        "deffy": "^2.2.2",
        "typpy": "^2.3.4"
      }
    },
    "unpipe": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
    },
    "uri-js": {
      "version": "4.2.2",
      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
    "unzip-response": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/unzip-response/-/unzip-response-1.0.2.tgz",
      "integrity": "sha1-uYTwh3/AqJwsdzzB73tbIytbBv4="
    },
    "url-parse-lax": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
      "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
      "requires": {
        "punycode": "^2.1.0"
        "prepend-http": "^1.0.1"
      }
    },
    "util-deprecate": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
    },
    "utils-merge": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
    },
    "uuid": {
      "version": "3.3.3",
      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
      "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ=="
    "validate-npm-package-license": {
      "version": "3.0.4",
      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
      "requires": {
        "spdx-correct": "^3.0.0",
        "spdx-expression-parse": "^3.0.0"
      }
    },
    "vary": {
      "version": "1.1.2",
      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
    },
    "verror": {
      "version": "1.10.0",
      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
      "requires": {
        "assert-plus": "^1.0.0",
        "core-util-is": "1.0.2",
        "extsprintf": "^1.2.0"
      }
    },
    "void-elements": {
      "version": "2.0.1",

 weather/package.json

@@ -12,7 +12,8 @@
    "express": "~4.16.1",
    "http-errors": "~1.6.3",
    "morgan": "~1.9.1",
    "pug": "2.0.0-beta11",
    "request": "^2.88.0"
    "node-fetch": "^2.6.0",
    "package.json": "^2.0.1",
    "pug": "2.0.0-beta11"
  }
}

 weather/routes/index.js

@@ -1,6 +1,7 @@
const express = require('express');
const router = express.Router();
const request = require('request');
//const request = require('request');
const fetch = require("node-fetch");
require('dotenv').config();
const OWM_API_KEY = process.env.OWM_API_KEY || 'invalid_key';

@@ -9,11 +10,30 @@
  res.render('index', { weather: null, err: null });
});

router.post('/get_weather', function (req,res) {
router.post('/get_weather', async function (req,res) {
  let city = req.body.city;
  let url = `http://api.openweathermap.org/data/2.5/weather?q=${city}&units=metric&appid=${OWM_API_KEY}`;

  request(url, function (err, response, body) {
  try {
    let data = await fetch(url);
    let weather = await data.json();
    console.log(weather);
    if(weather.cod == '404' && weather.main == undefined) {
      res.render('index', {weather: null, error: 'Error: Unknown city'});
    }
    else if (weather.cod == '401' && weather.main == undefined) {
      res.render('index', {weather: null, error: 'Error: Invalid API Key. Please see http://openweathermap.org/faq#error401 for more info.'});
    }
    else {
      res.render('index', {weather: weather, error: null});
    }
  }
  catch (err) {
    console.log(err);
    res.render('index', {weather: null, error: 'Error: Unable to invoke OpenWeatherMap API'});
  }

/*   request(url, function (err, response, body) {
    if (err) {
      res.render('index', {weather: null, error: 'Error: Unable to invoke OpenWeatherMap API'});
    }
@@ -30,7 +50,8 @@
        res.render('index', {weather: weather, error: null});
      }
    }
  });
  }); */

});

module.exports = router;