diff --git a/lib/nimrag/api/activity.ex b/lib/nimrag/api/activity.ex
index e1bd125..7315958 100644
--- a/lib/nimrag/api/activity.ex
+++ b/lib/nimrag/api/activity.ex
@@ -22,8 +22,8 @@ defmodule Nimrag.Api.Activity do
         field(:duration) => float(),
         {"maxHR", :max_hr} => float(),
         {"averageHR", :average_hr} => float(),
-        field(:elevation_gain) => float(),
-        field(:elevation_loss) => float()
+        field(:elevation_gain) => nullable(float()),
+        field(:elevation_loss) => nullable(float()),
       })
     end
   end
diff --git a/lib/nimrag/api/activity_list.ex b/lib/nimrag/api/activity_list.ex
index 8455437..d0c7e2e 100644
--- a/lib/nimrag/api/activity_list.ex
+++ b/lib/nimrag/api/activity_list.ex
@@ -11,8 +11,8 @@ defmodule Nimrag.Api.ActivityList do
           start_local_at: NaiveDateTime.t(),
           average_hr: float(),
           max_hr: float(),
-          elevation_gain: float(),
-          elevation_loss: float(),
+          elevation_gain: nil | float(),
+          elevation_loss: nil | float(),
           description: nil | String.t(),
           activity_type: ActivityType.t()
         }
@@ -32,9 +32,9 @@ defmodule Nimrag.Api.ActivityList do
       :duration => float(),
       {"averageHR", :average_hr} => float(),
       {"maxHR", :max_hr} => float(),
-      field(:elevationGain) => float(),
-      field(:elevationLoss) => float(),
-      field(:description) => nullable(str()),
+      optional(field(:elevationGain)) => nullable(float()),
+      optional(field(:elevationLoss)) => nullable(float()),
+      optional(field(:description)) => nullable(str()),
       field(:activity_type) => ActivityType.schematic()
     })
   end
diff --git a/lib/nimrag/api/profile.ex b/lib/nimrag/api/profile.ex
index 115a8ca..b3fda9d 100644
--- a/lib/nimrag/api/profile.ex
+++ b/lib/nimrag/api/profile.ex
@@ -137,9 +137,9 @@ defmodule Nimrag.Api.Profile do
     schema(__MODULE__, %{
       field(:activity_heart_rate_visibility) => str(),
       field(:activity_map_visibility) => str(),
-      field(:activity_power_visibility) => str(),
+      field(:activity_power_visibility) => nullable(str()),
       field(:activity_start_visibility) => str(),
-      field(:allow_golf_live_scoring) => bool(),
+      field(:allow_golf_live_scoring) => nullable(bool()),
       field(:allow_golf_scoring_by_connections) => bool(),
       field(:badge_visibility) => str(),
       field(:bio) => nullable(str()),
@@ -151,8 +151,8 @@ defmodule Nimrag.Api.Profile do
       field(:facebook_url) => nullable(str()),
       field(:favorite_activity_types) => list(str()),
       field(:favorite_cycling_activity_types) => list(str()),
-      field(:full_name) => str(),
-      field(:garmin_guid) => nullable(str()),
+      field(:full_name) => nullable(str()),
+      {"garminGUID", :garmin_guid} => nullable(str()),
       field(:id) => int(),
       field(:level_is_viewed) => bool(),
       field(:level_point_threshold) => int(),
diff --git a/lib/nimrag/auth.ex b/lib/nimrag/auth.ex
index 1ce704b..426e26e 100644
--- a/lib/nimrag/auth.ex
+++ b/lib/nimrag/auth.ex
@@ -295,7 +295,7 @@ defmodule Nimrag.Auth do
 
   defp signin_req(sso, %Req.Response{} = prev_resp) do
     sso.client
-    |> Req.Request.put_header("cookie", get_cookie(prev_resp))
+    |> Req.Request.put_header("cookie", Enum.join(get_cookie(prev_resp), "; "))
     |> Req.Request.put_header("referer", "#{sso.url}/embed")
     |> Req.get(
       url: "/signin",
@@ -307,7 +307,7 @@ defmodule Nimrag.Auth do
   defp submit_signin_req(sso, %Req.Response{} = prev_resp, credentials) do
     with {:ok, csrf_token} <- get_csrf_token(prev_resp) do
       sso.client
-      |> Req.Request.put_header("cookie", get_cookie(prev_resp))
+      |> Req.Request.put_header("cookie", Enum.join(get_cookie(prev_resp), "; "))
       |> Req.Request.put_header("referer", "#{sso.url}/signin")
       |> Req.post(
         url: "/signin",
diff --git a/mix.exs b/mix.exs
index 188e057..7f69a67 100644
--- a/mix.exs
+++ b/mix.exs
@@ -24,12 +24,6 @@ defmodule Nimrag.MixProject do
       """,
       aliases: aliases(),
       test_coverage: [tool: ExCoveralls],
-      preferred_cli_env: [
-        check: :test,
-        coveralls: :test,
-        "coveralls.detail": :test,
-        "coveralls.html": :test
-      ],
       dialyzer: [
         ignore_warnings: ".dialyzer_ignore.exs",
         plt_file: {:no_warn, "priv/plts/dialyzer.plt"},
@@ -60,6 +54,17 @@ defmodule Nimrag.MixProject do
     ]
   end
 
+  def cli do
+    [
+      preferred_envs: [
+        check: :test,
+        coveralls: :test,
+        "coveralls.detail": :test,
+        "coveralls.html": :test
+      ]
+    ]
+  end
+
   defp elixirc_paths(:test), do: ["lib", "test/support"]
   defp elixirc_paths(_), do: ["lib"]
 
@@ -75,7 +80,7 @@ defmodule Nimrag.MixProject do
       {:excoveralls, "~> 0.18.1", only: [:dev, :test], runtime: false},
       {:ex_doc, "~> 0.31", only: :dev, runtime: false},
       {:dialyxir, "~> 1.4", only: [:dev, :test], runtime: false},
-      {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
+      {:credo, "~> 1.7.11", only: [:dev, :test], runtime: false},
       {:styler, "~> 0.11", only: [:dev, :test], runtime: false}
     ]
   end
diff --git a/mix.lock b/mix.lock
index 02c5537..e42c958 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,13 +1,13 @@
 %{
   "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
   "castore": {:hex, :castore, "1.0.8", "dedcf20ea746694647f883590b82d9e96014057aff1d44d03ec90f36a5c0dc6e", [:mix], [], "hexpm", "0b2b66d2ee742cb1d9cb8c8be3b43c3a70ee8651f37b75a8b982e036752983f1"},
-  "credo": {:hex, :credo, "1.7.7", "771445037228f763f9b2afd612b6aa2fd8e28432a95dbbc60d8e03ce71ba4446", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "8bc87496c9aaacdc3f90f01b7b0582467b69b4bd2441fe8aae3109d843cc2f2e"},
+  "credo": {:hex, :credo, "1.7.16", "a9f1389d13d19c631cb123c77a813dbf16449a2aebf602f590defa08953309d4", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "d0562af33756b21f248f066a9119e3890722031b6d199f22e3cf95550e4f1579"},
   "dialyxir": {:hex, :dialyxir, "1.4.3", "edd0124f358f0b9e95bfe53a9fcf806d615d8f838e2202a9f430d59566b6b53b", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "bf2cfb75cd5c5006bec30141b131663299c661a864ec7fbbc72dfa557487a986"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.39", "424642f8335b05bb9eb611aa1564c148a8ee35c9c8a8bba6e129d51a3e3c6769", [:mix], [], "hexpm", "06553a88d1f1846da9ef066b87b57c6f605552cfbe40d20bd8d59cc6bde41944"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
   "ex_doc": {:hex, :ex_doc, "0.33.0", "690562b153153c7e4d455dc21dab86e445f66ceba718defe64b0ef6f0bd83ba0", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "3f69adc28274cb51be37d09b03e4565232862a4b10288a3894587b0131412124"},
   "excoveralls": {:hex, :excoveralls, "0.18.1", "a6f547570c6b24ec13f122a5634833a063aec49218f6fff27de9df693a15588c", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "d65f79db146bb20399f23046015974de0079668b9abb2f5aac074d078da60b8d"},
-  "file_system": {:hex, :file_system, "1.0.0", "b689cc7dcee665f774de94b5a832e578bd7963c8e637ef940cd44327db7de2cd", [:mix], [], "hexpm", "6752092d66aec5a10e662aefeed8ddb9531d79db0bc145bb8c40325ca1d8536d"},
+  "file_system": {:hex, :file_system, "1.1.1", "31864f4685b0148f25bd3fbef2b1228457c0c89024ad67f7a81a3ffbc0bbad3a", [:mix], [], "hexpm", "7a15ff97dfe526aeefb090a7a9d3d03aa907e100e262a0f8f7746b78f8f87a5d"},
   "finch": {:hex, :finch, "0.18.0", "944ac7d34d0bd2ac8998f79f7a811b21d87d911e77a786bc5810adb75632ada4", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: false]}, {:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.3", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 0.2.6 or ~> 1.0", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "69f5045b042e531e53edc2574f15e25e735b522c37e2ddb766e15b979e03aa65"},
   "hammer": {:hex, :hammer, "6.2.1", "5ae9c33e3dceaeb42de0db46bf505bd9c35f259c8defb03390cd7556fea67ee2", [:mix], [{:poolboy, "~> 1.5", [hex: :poolboy, repo: "hexpm", optional: false]}], "hexpm", "b9476d0c13883d2dc0cc72e786bac6ac28911fba7cc2e04b70ce6a6d9c4b2bdc"},
   "hpax": {:hex, :hpax, "1.0.0", "28dcf54509fe2152a3d040e4e3df5b265dcb6cb532029ecbacf4ce52caea3fd2", [:mix], [], "hexpm", "7f1314731d711e2ca5fdc7fd361296593fc2542570b3105595bb0bc6d0fad601"},