diff --git a/4_pipenv/Pipfile.lock b/4_pipenv/Pipfile.lock
index 6a4a37a..656847e 100644
--- a/4_pipenv/Pipfile.lock
+++ b/4_pipenv/Pipfile.lock
@@ -3,19 +3,6 @@
         "hash": {
             "sha256": "0e5f178f6727048c3f56070304e755dd5db4960ec887157e654bc838c48266c0"
         },
-        "host-environment-markers": {
-            "implementation_name": "cpython",
-            "implementation_version": "3.6.2",
-            "os_name": "posix",
-            "platform_machine": "x86_64",
-            "platform_python_implementation": "CPython",
-            "platform_release": "16.7.0",
-            "platform_system": "Darwin",
-            "platform_version": "Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64",
-            "python_full_version": "3.6.2",
-            "python_version": "3.6",
-            "sys_platform": "darwin"
-        },
         "pipfile-spec": 6,
         "requires": {
             "python_version": "3.6"
@@ -29,295 +16,210 @@
         ]
     },
     "default": {
-        "asn1crypto": {
-            "hashes": [
-                "sha256:654b7db3b120e23474e9a1e5e38d268c77e58a9e17d2cb595456c37309846494",
-                "sha256:0874981329cfebb366d6584c3d16e913f2a0eb026c9463efcc4aaf42a9d94d70"
-            ],
-            "version": "==0.23.0"
-        },
         "bcrypt": {
             "hashes": [
-                "sha256:4eb357ab2cd27f4c6151d33130c667e9245beb9d1e6779ccf7e196d4cc20ffa8",
-                "sha256:9c3b27bcc772958a4a051ae333de802423ebe0a5dd4e58e642e6e9d641cd7f3c",
-                "sha256:5dce51509227741323469b5c5ac6c6ccb2b2380800acc72e60bdf1b3359a5deb",
-                "sha256:c68f89a235752c2c191f17ca9a5a2496cb278b57ceb3753621f502a3f576fec5",
-                "sha256:06280fe19ffbcf6cf904de25190dd6fcd313e30bc79da305f5642a8295d1616e",
-                "sha256:e0d47491bd496f823c7fdfdd6154b3e68b8ddf07556210bc46d39af31035f90a",
-                "sha256:bebccf76fad01fe91426023b3a41ee991a3ab539f3d3d74b7acdb75baf111224",
-                "sha256:b949fd8cab330cddb101d4d5fa1b02772b887c31280f10ee4530c2090c378b13",
-                "sha256:1f3054d4da7c4a84b797d9130c36425b6e28134e9e67cd47b393774ea7168a3d",
-                "sha256:5129442f3f131c1210734699ffa2b7f956786e3e943d38a3158ce174708d0296",
-                "sha256:60c8aa69d18ee750d3678d67a265f1cf3559eabef98f90e3e646c3ff41e8795d",
-                "sha256:35cfdfa3f64f8bad68d25f261bdc60fbb9e43f164881c496cb590bf8001aad83",
-                "sha256:05b35b9842b009b44496fa5433ce462f69966291e50fbd471dbb427f399f748f",
-                "sha256:70b69c68aede91eb96df81227c0a060ead75a008c3d7e4858dc165265d125c44",
-                "sha256:329c547f5525808aecd77ccade9fd443e381f9d91fc8164da1dae9c195e1f1f5",
-                "sha256:84b65684f53c4b6b9d9f61d7f9306e286613187bdf46f30d9a0bbadccfde2205",
-                "sha256:81eb609e0e15336ce6d6acf37a2e4a89c5a2030b76bc7a907e7010d5b4332c38",
-                "sha256:69dc348c0b6b34b855f3f340756b35f0398e18f0637fc815be567c664cba7d1b",
-                "sha256:f2bfc588ff4e779e3659b8db348f5fb7b8192d63efc4bf15ecc50a72c820a221",
-                "sha256:9cdc6fcd0eda471b66aca565ce214639f1ad1c5f3a71a205c492d04d139bb75b",
-                "sha256:4396a33e112907f5978d5c40ca858b79fb1f6afd1caf3f8721c1411593d83bc2",
-                "sha256:8b32df00118b8e7de99eb5ca78374eff1a3934ca42972a54283ddcb85d77164d",
-                "sha256:73aabf7967c4dc319644c8bcfcbfe8106a475b16af481e0c12402dce2fbac44d",
-                "sha256:f05cf87b6787b19c0daf9a7b89ac98708e48903120ccc04e4120528daba280fb",
-                "sha256:66e3e1c105c1b811cf25974ee1eff53f2ebf4203c2e2c90e4b1097a837ba4a66",
-                "sha256:5929214153af8e3e461777837e0de1a00f2ced48d921e55fb952b4d5702e1be2",
-                "sha256:f1255ae53392e6e3a40955fa363d9522c915d3245c83029fd7a8ef500cd5f3be",
-                "sha256:b7679e478041ad8eae3d70e73dc7f6a2e913142a5fc35a6cabfcb7af977559c1",
-                "sha256:cdbcff01afda970b8d8e57633204f4501eddbe2c03932f51e7030aebddaf72d5",
-                "sha256:c22f3e2c29cb592b65020605649f6d3cd4cf626e6cf97ce1843547e5ea4d5f68",
-                "sha256:c8e236eabdaf230e5c49f26c28f95bc3788ba1296765a4e1b98143741fcd779c",
-                "sha256:7f08048c4315f56f02dcef350c9b149a1b7a88c46d316e16a83f1f25a71323c6",
-                "sha256:47d47df72e9f0462c8065a82da7b87f4b2577eb8a3fc855bcea165c2293beb84",
-                "sha256:b67e222177bfd51532955307a1ec9afd5e9c90ba2ff9561acae562d1e75c6ac1",
-                "sha256:5817b2b70a074cdab74c3871a2018d6931f8ef5148844006b8868b2be26f5abe",
-                "sha256:6645c8d0ad845308de3eb9be98b6fd22a46ec5412bfc664a423e411cdd8f5488"
+                "sha256:5b93c1726e50a93a033c36e5ca7fdcd29a5c7395af50a6892f5d9e7c6cfbfb29",
+                "sha256:63d4e3ff96188e5898779b6057878fecf3f11cfe6ec3b313ea09955d587ec7a7",
+                "sha256:81fec756feff5b6818ea7ab031205e1d323d8943d237303baca2c5f9c7846f34",
+                "sha256:a67fb841b35c28a59cebed05fbd3e80eea26e6d75851f0574a9273c80f3e9b55",
+                "sha256:c95d4cbebffafcdd28bd28bb4e25b31c50f6da605c81ffd9ad8a3d1b2ab7b1b6",
+                "sha256:cd1ea2ff3038509ea95f687256c46b79f5fc382ad0aa3664d200047546d511d1",
+                "sha256:cdcdcb3972027f83fe24a48b1e90ea4b584d35f1cc279d76de6fc4b13376239d"
             ],
-            "version": "==3.1.3"
+            "version": "==3.2.0"
         },
         "boto3": {
             "hashes": [
                 "sha256:38057b066990172ce6ebbf2a5e046a545503793581fcf14cab0e3821c6112eb0",
                 "sha256:f79f77dca2280f7780f39d72a5088f4cf2b626c0921e7185ed6ac17abfdd7e6c"
             ],
+            "index": "pypi",
             "version": "==1.4.7"
         },
         "botocore": {
             "hashes": [
-                "sha256:faa5263f36c051b151cd24a08071e6c41f76ed2bce944cd77a1d8d8a74352f20",
-                "sha256:5dbeccea742a4028809bedf1bc5b037674aa9d76f0bfd066c5f9f5de969ecc1f"
+                "sha256:19d519c8b37d7d35334267f25515e395c431a12a3c624214e2267d12950dbe95",
+                "sha256:5c1c023075269265f44a1c5b09a18d6865eca1c85a4be6886ddcc8af01b1c997"
             ],
-            "version": "==1.7.17"
+            "version": "==1.7.48"
         },
         "certifi": {
             "hashes": [
-                "sha256:54a07c09c586b0e4c619f02a5e94e36619da8e2b053e20f594348c0611803704",
-                "sha256:40523d2efb60523e113b44602298f0960e900388cf3bb6043f645cf57ea9e3f5"
+                "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3",
+                "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"
             ],
-            "version": "==2017.7.27.1"
+            "version": "==2020.6.20"
         },
         "cffi": {
             "hashes": [
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-            "version": "==1.11.0"
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+                "sha256:c53af463f4a40de78c58b8b2710ade243c81cbca641e34debf3396a9640d6ec1",
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+                "sha256:cc75f58cdaf043fe6a7a6c04b3b5a0e694c6a9e24050967747251fb80d7bce0d",
+                "sha256:d80998ed59176e8cba74028762fbd9b9153b9afc71ea118e63bbf5d4d0f9552b",
+                "sha256:de31b5164d44ef4943db155b3e8e17929707cac1e5bd2f363e67a56e3af4af6e",
+                "sha256:e66399cf0fc07de4dce4f588fc25bfe84a6d1285cc544e67987d22663393926d",
+                "sha256:f0620511387790860b249b9241c2f13c3a80e21a73e0b861a2df24e9d6f56730",
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+                "sha256:f92cdecb618e5fa4658aeb97d5eb3d2f47aa94ac6477c6daf0f306c5a3b9e6b1",
+                "sha256:f92f789e4f9241cd262ad7a555ca2c648a98178a953af117ef7fad46aa1d5591"
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+            "version": "==1.14.3"
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         "chardet": {
             "hashes": [
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             "version": "==3.0.4"
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-                "sha256:bc86d3de2c7d63f3c73dff24fa43c55c00c7b8ea8102ed638c903c939b85e6a6",
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-                "sha256:55cc98c93323efcf6f3300b6e9a7d435146a9d451ffd27aa14074f576f275786",
-                "sha256:4ef205496c518aae7e699731dfff4b630c046ea9dbbe34e8ec8ce77bb399c1c7",
-                "sha256:886759453c5b93b1e8953e92abee65ee09fdf78bf655c95d0a206d6387adbfed",
-                "sha256:0f3dcdd06c5491cad2ed283ebc802805e3ac77ffe4789ad1b44ff0f0f891f59b",
-                "sha256:8067fce92ec98cb52fabe2e10205ff27dba5755d9ffc1f521be9c504f9a6d5fc",
-                "sha256:5a266ff306683cd82b2f19203f469b7580aee115f1818d2b2d1e12f1ee7fd12b",
-                "sha256:d5341dac22e8ab080e637c632d1b1e92acaa8e66a02d139c0c795c1797531384",
-                "sha256:a83318144a0037f264891ddfcbae9b75303949bb0efaece9713df5e04388b7ef",
-                "sha256:d04bb2425086c3fe86f7bc48915290b13e798497839fbb18ab7f6dffcf98cc3a"
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