diff --git a/.dialyzer_ignore.exs b/.dialyzer_ignore.exs
deleted file mode 100644
index 833c446..0000000
--- a/.dialyzer_ignore.exs
+++ /dev/null
@@ -1,3 +0,0 @@
-[
-    { "lib/phoenix/router.ex", :pattern_match, 402 }
-  ]
\ No newline at end of file
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 28fd5aa..bf2e5d4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,8 +18,8 @@ jobs:
     
     strategy:
       matrix:
-        elixir: [1.11]
-        otp: [23.1]
+        elixir: [1.12]
+        otp: [24.0]
 
     steps:
       - uses: actions/checkout@v2
@@ -54,8 +54,8 @@ jobs:
 
     strategy:
       matrix:
-        elixir: [1.11]
-        otp: [23.1]
+        elixir: [1.12]
+        otp: [24.0]
       
     steps:
       - uses: actions/checkout@v2
@@ -86,8 +86,8 @@ jobs:
 
     strategy:
       matrix:
-        elixir: [1.11]
-        otp: [23.1]
+        elixir: [1.12]
+        otp: [24.0]
       
     steps:
       - uses: actions/checkout@v2
@@ -110,7 +110,7 @@ jobs:
         id: plt-cache
         with:
           path: dializer/plts/
-          key: ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plts-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+          key: plt-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plts-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
 
       - name: Generate PLT
         if: steps.plt-cache.outputs.cache-hit != 'true'
@@ -119,7 +119,7 @@ jobs:
           mix dialyzer --plt
 
       - name: Run dialyzer
-        run: mix dialyzer --no-check --halt-exit-status
+        run: mix dialyzer --no-check
         
   tests:
     name: Tests
@@ -128,8 +128,8 @@ jobs:
 
     strategy:
       matrix:
-        elixir: [1.11]
-        otp: [23.1]
+        elixir: [1.12]
+        otp: [24.0]
   
     services:
       postgres:
diff --git a/.gitignore b/.gitignore
index bbb0852..b9f4072 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,7 @@
 /cover/
 
 # The directory where the files will be saved on every build.
-/dialyzer/
+/dialyzer/plts/
 
 # The directory Mix downloads your dependencies sources to.
 /deps/
diff --git a/.tool-versions b/.tool-versions
index 0db5286..29940d1 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-elixir 1.11.4-otp-23
-erlang 23.1
+elixir 1.12.2-otp-24
+erlang 24.0
diff --git a/apps/authenticator/coveralls.json b/apps/authenticator/coveralls.json
index 86f6730..89444c6 100644
--- a/apps/authenticator/coveralls.json
+++ b/apps/authenticator/coveralls.json
@@ -7,6 +7,7 @@
     "skip_files": [
         "test/support/data_case.ex",
         "test/support/factory.ex",
+        "lib/ports/resource_manager.ex",
         "lib/sign_in/commands/behaviour.ex",
         "lib/sessions/cache.ex",
         "lib/authenticator.ex",
diff --git a/apps/authenticator/mix.exs b/apps/authenticator/mix.exs
index 82a958b..f8b1c79 100644
--- a/apps/authenticator/mix.exs
+++ b/apps/authenticator/mix.exs
@@ -12,7 +12,7 @@ defmodule Authenticator.MixProject do
       elixirc_paths: elixirc_paths(Mix.env()),
       deps_path: "../../deps",
       lockfile: "../../mix.lock",
-      elixir: "~> 1.11",
+      elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       aliases: aliases(),
diff --git a/apps/authorizer/coveralls.json b/apps/authorizer/coveralls.json
new file mode 100644
index 0000000..ce7927a
--- /dev/null
+++ b/apps/authorizer/coveralls.json
@@ -0,0 +1,12 @@
+{
+    "coverage_options": {
+        "treat_no_relevant_lines_as_covered": true,
+        "output_dir": "cover/",
+        "minimum_coverage": 80
+    },
+    "skip_files": [
+        "test/support/data_case.ex",
+        "test/support/factory.ex",
+        "lib/ports/resource_manager.ex"
+    ]
+}
\ No newline at end of file
diff --git a/apps/authorizer/mix.exs b/apps/authorizer/mix.exs
index 078a21e..bc52fa3 100644
--- a/apps/authorizer/mix.exs
+++ b/apps/authorizer/mix.exs
@@ -12,7 +12,7 @@ defmodule Authorizer.MixProject do
       elixirc_paths: elixirc_paths(Mix.env()),
       deps_path: "../../deps",
       lockfile: "../../mix.lock",
-      elixir: "~> 1.11",
+      elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       test_coverage: [tool: ExCoveralls]
diff --git a/apps/resource_manager/coveralls.json b/apps/resource_manager/coveralls.json
index 6d00107..65c538f 100644
--- a/apps/resource_manager/coveralls.json
+++ b/apps/resource_manager/coveralls.json
@@ -7,6 +7,7 @@
     "skip_files": [
         "test/support/data_case.ex",
         "test/support/factory.ex",
+        "lib/ports/authenticator.ex",
         "lib/resource_manager.ex",
         "lib/credentials/ports/*",
         "lib/application.ex",
diff --git a/apps/resource_manager/lib/credentials/schemas/password.ex b/apps/resource_manager/lib/credentials/schemas/password.ex
index 38bbbe0..cdd7c86 100644
--- a/apps/resource_manager/lib/credentials/schemas/password.ex
+++ b/apps/resource_manager/lib/credentials/schemas/password.ex
@@ -26,8 +26,8 @@ defmodule ResourceManager.Credentials.Schemas.Password do
           password_hash: String.t(),
           algorithm: String.t(),
           salt: integer(),
-          inserted_at: Datetime.t(),
-          updated_at: Datetime.t()
+          inserted_at: NaiveDatetime.t(),
+          updated_at: NaiveDatetime.t()
         }
 
   # Changeset validation arguments
@@ -51,7 +51,7 @@ defmodule ResourceManager.Credentials.Schemas.Password do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @optional_fields)
diff --git a/apps/resource_manager/lib/credentials/schemas/public_key.ex b/apps/resource_manager/lib/credentials/schemas/public_key.ex
index 669d919..d102326 100644
--- a/apps/resource_manager/lib/credentials/schemas/public_key.ex
+++ b/apps/resource_manager/lib/credentials/schemas/public_key.ex
@@ -44,7 +44,7 @@ defmodule ResourceManager.Credentials.Schemas.PublicKey do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @required_fields ++ @optional_fields)
diff --git a/apps/resource_manager/lib/domain.ex b/apps/resource_manager/lib/domain.ex
index 01ad45e..f8c8804 100644
--- a/apps/resource_manager/lib/domain.ex
+++ b/apps/resource_manager/lib/domain.ex
@@ -7,6 +7,8 @@ defmodule ResourceManager.Domain do
     quote do
       alias ResourceManager.Repo
 
+      require Logger
+
       @schema unquote(opts[:schema_model])
 
       @typedoc "Possible response types"
@@ -18,6 +20,15 @@ defmodule ResourceManager.Domain do
         params
         |> @schema.changeset()
         |> Repo.insert()
+        |> case do
+          {:ok, _model} = response ->
+            Logger.debug("#{inspect(@schema)} created with success")
+            response
+
+          {:error, reason} = response ->
+            Logger.debug("#{inspect(@schema)} creation failed because #{inspect(reason)}")
+            response
+        end
       end
 
       @doc "Updates a #{@schema} with the given params"
@@ -26,11 +37,32 @@ defmodule ResourceManager.Domain do
         model
         |> @schema.changeset(params)
         |> Repo.update()
+        |> case do
+          {:ok, _model} = response ->
+            Logger.debug("#{inspect(@schema)} updated with success")
+            response
+
+          {:error, reason} = response ->
+            Logger.debug("#{inspect(@schema)} update failed because #{inspect(reason)}")
+            response
+        end
       end
 
       @doc "Deletes a #{@schema} from the database"
       @spec delete(model :: @schema.t()) :: {:ok, @schema.t()}
-      def delete(%@schema{} = model), do: Repo.delete(model)
+      def delete(%@schema{} = model) do
+        model
+        |> Repo.delete()
+        |> case do
+          {:ok, _model} = response ->
+            Logger.debug("#{inspect(@schema)} deleted with success")
+            response
+
+          {:error, reason} = response ->
+            Logger.debug("#{inspect(@schema)} delete failed because #{inspect(reason)}")
+            response
+        end
+      end
 
       @doc "Checks if a #{@schema} exists with the given fields"
       @spec exists?(fields :: Keyword.t()) :: boolean()
diff --git a/apps/resource_manager/lib/identities/commands/create_client_application.ex b/apps/resource_manager/lib/identities/commands/create_client_application.ex
index 61cf2e0..2d2360e 100644
--- a/apps/resource_manager/lib/identities/commands/create_client_application.ex
+++ b/apps/resource_manager/lib/identities/commands/create_client_application.ex
@@ -47,8 +47,8 @@ defmodule ResourceManager.Identities.Commands.CreateClientApplication do
     |> ClientApplications.create()
   end
 
-  defp create_permission(client_application, %{scopes: scopes}),
+  defp create_permission(client_application, %{scopes: scopes}) when is_list(scopes),
     do: ConsentScope.execute(client_application, scopes)
 
-  defp create_permission(_client_application, _), do: {:ok, :ignore}
+  defp create_permission(_client_application, _permission), do: {:ok, :ignore}
 end
diff --git a/apps/resource_manager/lib/identities/commands/create_user.ex b/apps/resource_manager/lib/identities/commands/create_user.ex
index 46a657f..961a4ba 100644
--- a/apps/resource_manager/lib/identities/commands/create_user.ex
+++ b/apps/resource_manager/lib/identities/commands/create_user.ex
@@ -47,6 +47,8 @@ defmodule ResourceManager.Identities.Commands.CreateUser do
     |> Users.create()
   end
 
-  defp create_permission(user, %{scopes: scopes}), do: ConsentScope.execute(user, scopes)
-  defp create_permission(_user, _), do: {:ok, :ignore}
+  defp create_permission(user, %{scopes: scopes}) when is_list(scopes),
+    do: ConsentScope.execute(user, scopes)
+
+  defp create_permission(_user, _permission), do: {:ok, :ignore}
 end
diff --git a/apps/resource_manager/lib/identities/schemas/client_application.ex b/apps/resource_manager/lib/identities/schemas/client_application.ex
index 27dae10..8c0d1f2 100644
--- a/apps/resource_manager/lib/identities/schemas/client_application.ex
+++ b/apps/resource_manager/lib/identities/schemas/client_application.ex
@@ -61,7 +61,7 @@ defmodule ResourceManager.Identities.Schemas.ClientApplication do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @required_fields ++ @optional_fields)
diff --git a/apps/resource_manager/lib/identities/schemas/user.ex b/apps/resource_manager/lib/identities/schemas/user.ex
index 46924c8..4523f97 100644
--- a/apps/resource_manager/lib/identities/schemas/user.ex
+++ b/apps/resource_manager/lib/identities/schemas/user.ex
@@ -47,7 +47,7 @@ defmodule ResourceManager.Identities.Schemas.User do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @required_fields ++ @optional_fields)
diff --git a/apps/resource_manager/lib/permissions/commands/remove_scope.ex b/apps/resource_manager/lib/permissions/commands/remove_scope.ex
index 37591c2..4ef54c8 100644
--- a/apps/resource_manager/lib/permissions/commands/remove_scope.ex
+++ b/apps/resource_manager/lib/permissions/commands/remove_scope.ex
@@ -9,14 +9,8 @@ defmodule ResourceManager.Permissions.Commands.RemoveScope do
   alias ResourceManager.Permissions.Schemas.{ClientApplicationScope, UserScope}
   alias ResourceManager.Repo
 
-  @typedoc "All possible identities"
-  @type identities :: User.t() | ClientApplication.t()
-
-  @typedoc "All possible responses"
-  @type possible_response :: {:ok, list(identities())} | {:error, Ecto.Changeset.t()}
-
   @doc "Remove scopes from the identity"
-  @spec execute(identity :: identities(), scopes :: list(String.t())) :: possible_response()
+  @spec execute(identity :: User.t() | ClientApplication.t(), scopes :: list(String.t())) :: :ok
   def execute(%User{} = user, scopes) when is_list(scopes) do
     Logger.debug("Removing scopes from user #{user.id}")
 
diff --git a/apps/resource_manager/lib/permissions/schema/client_application_scope.ex b/apps/resource_manager/lib/permissions/schemas/client_application_scope.ex
similarity index 95%
rename from apps/resource_manager/lib/permissions/schema/client_application_scope.ex
rename to apps/resource_manager/lib/permissions/schemas/client_application_scope.ex
index 4d4c145..f4eb2c9 100644
--- a/apps/resource_manager/lib/permissions/schema/client_application_scope.ex
+++ b/apps/resource_manager/lib/permissions/schemas/client_application_scope.ex
@@ -37,7 +37,7 @@ defmodule ResourceManager.Permissions.Schemas.ClientApplicationScope do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @required_fields)
diff --git a/apps/resource_manager/lib/permissions/schema/scope.ex b/apps/resource_manager/lib/permissions/schemas/scope.ex
similarity index 93%
rename from apps/resource_manager/lib/permissions/schema/scope.ex
rename to apps/resource_manager/lib/permissions/schemas/scope.ex
index 07b4710..c42bfc5 100644
--- a/apps/resource_manager/lib/permissions/schema/scope.ex
+++ b/apps/resource_manager/lib/permissions/schemas/scope.ex
@@ -34,7 +34,7 @@ defmodule ResourceManager.Permissions.Schemas.Scope do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @required ++ @optional)
diff --git a/apps/resource_manager/lib/permissions/schema/user_scope.ex b/apps/resource_manager/lib/permissions/schemas/user_scope.ex
similarity index 95%
rename from apps/resource_manager/lib/permissions/schema/user_scope.ex
rename to apps/resource_manager/lib/permissions/schemas/user_scope.ex
index b45a145..8fbf685 100644
--- a/apps/resource_manager/lib/permissions/schema/user_scope.ex
+++ b/apps/resource_manager/lib/permissions/schemas/user_scope.ex
@@ -37,7 +37,7 @@ defmodule ResourceManager.Permissions.Schemas.UserScope do
   def changeset(params) when is_map(params), do: changeset(%__MODULE__{}, params)
 
   @doc "Generates an `%Ecto.Changeset to be used in update operations."
-  @spec changeset(model :: __MODULE__.t(), params :: map()) :: Ecto.Changeset.t()
+  @spec changeset(model :: %__MODULE__{}, params :: map()) :: Ecto.Changeset.t()
   def changeset(%__MODULE__{} = model, params) when is_map(params) do
     model
     |> cast(params, @required_fields)
diff --git a/apps/resource_manager/mix.exs b/apps/resource_manager/mix.exs
index ed8452b..ad6d173 100644
--- a/apps/resource_manager/mix.exs
+++ b/apps/resource_manager/mix.exs
@@ -12,7 +12,7 @@ defmodule ResourceManager.MixProject do
       elixirc_paths: elixirc_paths(Mix.env()),
       deps_path: "../../deps",
       lockfile: "../../mix.lock",
-      elixir: "~> 1.11",
+      elixir: "~> 1.12",
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),
       deps: deps(),
diff --git a/apps/rest_api/coveralls.json b/apps/rest_api/coveralls.json
index abb7dbe..ed160cb 100644
--- a/apps/rest_api/coveralls.json
+++ b/apps/rest_api/coveralls.json
@@ -6,6 +6,9 @@
     },
     "skip_files": [
         "test/support/conn_case.ex",
+        "lib/ports/authenticator.ex",
+        "lib/ports/authorizer.ex",
+        "lib/ports/resource_manager.ex",
         "lib/application.ex",
         "lib/controller.ex",
         "lib/telemetry.ex",
diff --git a/apps/rest_api/lib/plugs/tracker.ex b/apps/rest_api/lib/plugs/tracker.ex
index e1ac57d..ee9b97d 100644
--- a/apps/rest_api/lib/plugs/tracker.ex
+++ b/apps/rest_api/lib/plugs/tracker.ex
@@ -20,9 +20,7 @@ defmodule RestAPI.Plugs.Tracker do
       "request_id" => get_request_id(conn)
     }
 
-    Logger.metadata(traking_data)
-
-    put_private(conn, :tracking, traking_data)
+    append_tracking_data(conn, traking_data)
   end
 
   defp get_remote_ip(conn) do
@@ -48,4 +46,12 @@ defmodule RestAPI.Plugs.Tracker do
       [request_id | _] -> request_id
     end
   end
+
+  defp append_tracking_data(conn, traking_data) do
+    traking_data
+    |> Enum.map(fn {key, value} -> {String.to_atom(key), value} end)
+    |> Logger.metadata()
+
+    put_private(conn, :tracking, traking_data)
+  end
 end
diff --git a/apps/rest_api/mix.exs b/apps/rest_api/mix.exs
index 808e56f..f170165 100644
--- a/apps/rest_api/mix.exs
+++ b/apps/rest_api/mix.exs
@@ -11,7 +11,7 @@ defmodule RestAPI.MixProject do
       config_path: "../../config/config.exs",
       deps_path: "../../deps",
       lockfile: "../../mix.lock",
-      elixir: "~> 1.11",
+      elixir: "~> 1.12",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:phoenix] ++ Mix.compilers(),
       start_permanent: Mix.env() == :prod,
diff --git a/dialyzer/ignore-warnings.exs b/dialyzer/ignore-warnings.exs
new file mode 100644
index 0000000..45d0a33
--- /dev/null
+++ b/dialyzer/ignore-warnings.exs
@@ -0,0 +1,33 @@
+[
+    {"lib/identities/users.ex", :no_return},
+    {"lib/identities/users.ex", :unknown_type},
+    {"lib/identities/client_applications.ex", :no_return},
+    {"lib/identities/client_applications.ex", :unknown_type},
+    {"lib/identities/schemas/user.ex", :no_return},
+    {"lib/identities/schemas/user.ex", :unknown_type},
+    {"lib/identities/schemas/client_application.ex", :no_return},
+    {"lib/identities/schemas/client_application.ex", :unknown_type},
+    {"lib/identities/commands/create_user.ex", :unknown_type},
+    {"lib/identities/commands/create_client_application.ex", :unknown_type},
+    {"lib/identities/commands/get_identity.ex", :unknown_type},
+    {"lib/credentials/passwords.ex", :no_return},
+    {"lib/credentials/passwords.ex", :unknown_type},
+    {"lib/credentials/public_keys.ex", :no_return},
+    {"lib/credentials/public_keys.ex", :unknown_type},
+    {"lib/credentials/schemas/password.ex", :no_return},
+    {"lib/credentials/schemas/password.ex", :unknown_type},
+    {"lib/credentials/schemas/public_key.ex", :no_return},
+    {"lib/credentials/schemas/public_key.ex", :unknown_type},
+    {"lib/credentials/passwords.ex", :unknown_type},
+    {"lib/permissions/scopes.ex", :no_return},
+    {"lib/permissions/scopes.ex", :unknown_type},
+    {"lib/permissions/schemas/scope.ex", :no_return},
+    {"lib/permissions/schemas/scope.ex", :unknown_type},
+    {"lib/permissions/schemas/user_scope.ex", :no_return},
+    {"lib/permissions/schemas/user_scope.ex", :unknown_type},
+    {"lib/permissions/schemas/client_application_scope.ex", :no_return},
+    {"lib/permissions/schemas/client_application_scope.ex", :unknown_type},
+    {"lib/permissions/commands/consent_scope.ex", :unknown_type},
+    {"lib/permissions/commands/remove_scope.ex", :unknown_type},
+    {"lib/phoenix/router.ex", :pattern_match, 402}
+]
diff --git a/mix.exs b/mix.exs
index 0c60ada..7c94948 100644
--- a/mix.exs
+++ b/mix.exs
@@ -36,7 +36,7 @@ defmodule WatcherEx.MixProject do
       # Tools
       {:junit_formatter, "~> 3.2", only: [:test]},
       {:dialyxir, "~> 1.1", only: [:dev, :test], runtime: false},
-      {:credo, "~> 1.5", only: [:dev, :test], runtime: false},
+      {:credo, "~> 1.5", only: [:dev, :test], runtime: true},
       {:ex_doc, "~> 0.24", only: :dev, runtime: false},
       {:excoveralls, "~> 0.14", only: :test},
       {:mox, "~> 0.5", only: :test}
@@ -69,8 +69,8 @@ defmodule WatcherEx.MixProject do
     [
       plt_add_apps: [:ex_unit],
       plt_core_path: "dialyzer/plts/",
-      plt_file: {:no_warn, "dialyzer/plts/watcher_ex.plt"},
-      ignore_warnings: "dialyzer.ignore-warnings"
+      plt_file: {:no_warn, "dialyzer/plts/dialyzer.plt"},
+      ignore_warnings: "dialyzer/ignore-warnings.exs"
     ]
   end