diff --git a/README.md b/README.md
index 2c7311d..ef5ef1c 100644
--- a/README.md
+++ b/README.md
@@ -21,14 +21,14 @@ The package can be installed by adding `rajska` to your list of dependencies in
 ```elixir
 def deps do
   [
-    {:rajska, "~> 0.8.1"},
+    {:rajska, "~> 0.9.0"},
   ]
 end
 ```
 
 ## Usage
 
-Create your Authorization module, which will implement the [Rajska Authorization](https://hexdocs.pm/rajska/Rajska.Authorization.html) behaviour and contain the logic to validate user permissions and will be called by Rajska middlewares. Rajska provides some helper functions by default, such as [role_authorized?/2](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:role_authorized?/2), [has_user_access?/4](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/4) and [field_authorized?/3](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:field_authorized?/3), but you can override them with your application needs.
+Create your Authorization module, which will implement the [Rajska Authorization](https://hexdocs.pm/rajska/Rajska.Authorization.html) behaviour and contain the logic to validate user permissions and will be called by Rajska middlewares. Rajska provides some helper functions by default, such as [role_authorized?/2](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:role_authorized?/2), [has_user_access?/3](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/3) and [field_authorized?/3](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:field_authorized?/3), but you can override them with your application needs.
 
 ```elixir
   defmodule Authorization do
@@ -127,14 +127,14 @@ In the above example, `:all` and `:admin` (`super_role`) permissions don't requi
 
 ## Options
 
-All the following options are sent to [has_user_access?/4](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/4):
+All the following options are sent to [has_user_access?/3](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/3):
 
 * `:scope`
   - `false`: disables scoping
-  - `User`: a module that will be passed to `c:Rajska.Authorization.has_user_access?/4`. It must define a struct.
+  - `User`: a module that will be passed to `c:Rajska.Authorization.has_user_access?/3`. It must define a struct.
 * `:args`
   - `%{user_id: [:params, :id]}`: where `user_id` is the scoped field and `id` is an argument nested inside the `params` argument.
-  - `:id`: this is the same as `%{id: :id}`, where `:id` is both the query argument and the scoped field that will be passed to [has_user_access?/4](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/4)
+  - `:id`: this is the same as `%{id: :id}`, where `:id` is both the query argument and the scoped field that will be passed to [has_user_access?/3](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/3)
   - `[:code, :user_group_id]`: this is the same as `%{code: :code, user_group_id: :user_group_id}`, where `code` and `user_group_id` are both query arguments and scoped fields.
 * `:optional` (optional) - when set to true the arguments are optional, so if no argument is provided, the query will be authorized. Defaults to false.
 * `:rule` (optional) - allows the same struct to have different rules. See `Rajska.Authorization` for `rule` default settings.
@@ -225,7 +225,7 @@ object :wallet do
 end
 ```
 
-To define custom rules for the scoping, use [has_user_access?/4](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/4). For example:
+To define custom rules for the scoping, use [has_user_access?/3](https://hexdocs.pm/rajska/Rajska.Authorization.html#c:has_user_access?/3). For example:
 
 ```elixir
 defmodule Authorization do
@@ -234,13 +234,13 @@ defmodule Authorization do
     super_role: :admin
 
   @impl true
-  def has_user_access?(%{role: :admin}, User, _field, _rule), do: true
-  def has_user_access?(%{id: user_id}, User, {:id, id}, _rule) when user_id === id, do: true
-  def has_user_access?(_current_user, User, _field, _rule), do: false
+  def has_user_access?(%{role: :admin}, %User{}, _rule), do: true
+  def has_user_access?(%{id: user_id}, %User{id: id}, _rule) when user_id === id, do: true
+  def has_user_access?(_current_user, %User{}, _rule), do: false
 end
 ```
 
-Keep in mind that the `field_value` provided to `has_user_access?/4` can be `nil`. This case can be handled as you wish.
+Keep in mind that the `field_value` provided to `has_user_access?/3` can be `nil`. This case can be handled as you wish.
 For example, to not raise any authorization errors and just return `nil`:
 
 ```elixir
@@ -250,11 +250,9 @@ defmodule Authorization do
     super_role: :admin
 
   @impl true
-  def has_user_access?(_user, _scope, {_field, nil}, _rule), do: true
-
-  def has_user_access?(%{role: :admin}, User, _field, _rule), do: true
-  def has_user_access?(%{id: user_id}, User, {:id, id}, _rule) when user_id === id, do: true
-  def has_user_access?(_current_user, User, _field, _rule), do: false
+  def has_user_access?(%{role: :admin}, %User{}, _rule), do: true
+  def has_user_access?(%{id: user_id}, %User{id: id}, _rule) when user_id === id, do: true
+  def has_user_access?(_current_user, %User{}, _rule), do: false
 end
 ```
 
diff --git a/lib/authorization.ex b/lib/authorization.ex
index 6033f52..a0dc226 100644
--- a/lib/authorization.ex
+++ b/lib/authorization.ex
@@ -21,8 +21,7 @@ defmodule Rajska.Authorization do
 
   @callback has_user_access?(
     current_user,
-    scope :: module(),
-    {field :: any(), field_value :: any()},
+    scoped_struct :: struct(),
     rule :: any()
   ) :: boolean()
 
@@ -33,6 +32,6 @@ defmodule Rajska.Authorization do
                       not_scoped_roles: 0,
                       role_authorized?: 2,
                       field_authorized?: 3,
-                      has_user_access?: 4,
+                      has_user_access?: 3,
                       unauthorized_msg: 1
 end
diff --git a/lib/middlewares/object_scope_authorization.ex b/lib/middlewares/object_scope_authorization.ex
index 11c3611..2447352 100644
--- a/lib/middlewares/object_scope_authorization.ex
+++ b/lib/middlewares/object_scope_authorization.ex
@@ -39,7 +39,7 @@ defmodule Rajska.ObjectScopeAuthorization do
   end
   ```
 
-  To define custom rules for the scoping, use `c:Rajska.Authorization.has_user_access?/4`. For example:
+  To define custom rules for the scoping, use `c:Rajska.Authorization.has_user_access?/3`. For example:
 
   ```elixir
   defmodule Authorization do
@@ -47,13 +47,13 @@ defmodule Rajska.ObjectScopeAuthorization do
       valid_roles: [:user, :admin]
 
     @impl true
-    def has_user_access?(%{role: :admin}, _struct, {_field, _field_value}, _rule), do: true
-    def has_user_access?(%{id: user_id}, User, {:id, id}, _rule) when user_id === id, do: true
-    def has_user_access?(_current_user, User, {_field, _field_value}, _rule), do: false
+    def has_user_access?(%{role: :admin}, _, _scoped_struct, _rule), do: true
+    def has_user_access?(%{id: user_id}, %User{id: id}, _rule) when user_id === id, do: true
+    def has_user_access?(_current_user, %User{}, _rule), do: false
   end
   ```
 
-  Keep in mind that the `field_value` provided to `has_user_access?/4` can be `nil`. This case can be handled as you wish.
+  Keep in mind that the `field_value` provided to `has_user_access?/3` can be `nil`. This case can be handled as you wish.
   For example, to not raise any authorization errors and just return `nil`:
 
   ```elixir
@@ -62,15 +62,13 @@ defmodule Rajska.ObjectScopeAuthorization do
       valid_roles: [:user, :admin]
 
     @impl true
-    def has_user_access?(_user, _scope, {_field, nil}, _rule), do: true
-
-    def has_user_access?(%{role: :admin}, User, {_field, _field_value}, _rule), do: true
-    def has_user_access?(%{id: user_id}, User, {:id, id}, _rule) when user_id === id, do: true
-    def has_user_access?(_current_user, User, {_field, _field_value}, _rule), do: false
+    def has_user_access?(%User{role: :admin}, _scoped_struct, _rule), do: true
+    def has_user_access?(%User{id: user_id}, %User{id: id}, _rule) when user_id === id, do: true
+    def has_user_access?(_current_user, %User{}, _rule), do: false
   end
   ```
 
-  The `rule` keyword is not mandatory and will be pattern matched in `has_user_access?/4`:
+  The `rule` keyword is not mandatory and will be pattern matched in `has_user_access?/3`:
 
   ```elixir
   defmodule Authorization do
@@ -78,8 +76,8 @@ defmodule Rajska.ObjectScopeAuthorization do
       valid_roles: [:user, :admin]
 
     @impl true
-    def has_user_access?(%{id: user_id}, Wallet, {_field, _field_value}, :read_only), do: true
-    def has_user_access?(%{id: user_id}, Wallet, {_field, _field_value}, :default), do: false
+    def has_user_access?(%{id: user_id}, %Wallet{}, :read_only), do: true
+    def has_user_access?(%{id: user_id}, %Wallet{}, :default), do: false
   end
   ```
 
diff --git a/lib/middlewares/query_scope_authorization.ex b/lib/middlewares/query_scope_authorization.ex
index ab18bb3..efaf907 100644
--- a/lib/middlewares/query_scope_authorization.ex
+++ b/lib/middlewares/query_scope_authorization.ex
@@ -43,14 +43,14 @@ defmodule Rajska.QueryScopeAuthorization do
 
   ## Options
 
-  All the following options are sent to `c:Rajska.Authorization.has_user_access?/4`:
+  All the following options are sent to `c:Rajska.Authorization.has_user_access?/3`:
 
     * `:scope`
       - `false`: disables scoping
-      - `User`: a module that will be passed to `c:Rajska.Authorization.has_user_access?/4`. It must define a struct.
+      - `User`: a module that will be passed to `c:Rajska.Authorization.has_user_access?/3`. It must define a struct.
     * `:args`
       - `%{user_id: [:params, :id]}`: where `user_id` is the scoped field and `id` is an argument nested inside the `params` argument.
-      - `:id`: this is the same as `%{id: :id}`, where `:id` is both the query argument and the scoped field that will be passed to `c:Rajska.Authorization.has_user_access?/4`
+      - `:id`: this is the same as `%{id: :id}`, where `:id` is both the query argument and the scoped field that will be passed to `c:Rajska.Authorization.has_user_access?/3`
       - `[:code, :user_group_id]`: this is the same as `%{code: :code, user_group_id: :user_group_id}`, where `code` and `user_group_id` are both query arguments and scoped fields.
     * `:optional` (optional) - when set to true the arguments are optional, so if no argument is provided, the query will be authorized. Defaults to false.
     * `:rule` (optional) - allows the same struct to have different rules. See `Rajska.Authorization` for `rule` default settings.
diff --git a/lib/rajska.ex b/lib/rajska.ex
index 075ad29..b2cfb79 100644
--- a/lib/rajska.ex
+++ b/lib/rajska.ex
@@ -16,14 +16,14 @@ defmodule Rajska do
   ```elixir
   def deps do
     [
-      {:rajska, "~> 0.8.1"},
+      {:rajska, "~> 0.9.0"},
     ]
   end
   ```
 
   ## Usage
 
-  Create your Authorization module, which will implement the `Rajska.Authorization` behaviour and contain the logic to validate user permissions and will be called by Rajska middlewares. Rajska provides some helper functions by default, such as `c:Rajska.Authorization.role_authorized?/2`, `c:Rajska.Authorization.has_user_access?/4` and `c:Rajska.Authorization.field_authorized?/3`, but you can override them with your application needs.
+  Create your Authorization module, which will implement the `Rajska.Authorization` behaviour and contain the logic to validate user permissions and will be called by Rajska middlewares. Rajska provides some helper functions by default, such as `c:Rajska.Authorization.role_authorized?/2`, `c:Rajska.Authorization.has_user_access?/3` and `c:Rajska.Authorization.field_authorized?/3`, but you can override them with your application needs.
 
   ```elixir
   defmodule Authorization do
@@ -100,12 +100,9 @@ defmodule Rajska do
       def role_authorized?(user_role, allowed_role) when is_atom(allowed_role), do: user_role === allowed_role
       def role_authorized?(user_role, allowed_roles) when is_list(allowed_roles), do: user_role in allowed_roles
 
-      def has_user_access?(%user_struct{id: user_id} = current_user, scope, {field, field_value}, unquote(default_rule)) do
+      def has_user_access?(%user_struct{id: user_id} = current_user, %scope{} = struct, unquote(default_rule)) do
         super_user? = current_user |> get_user_role() |> super_role?()
-        owner? =
-          (user_struct === scope)
-          && (field === :id)
-          && (user_id === field_value)
+        owner? = (user_struct === scope) && (user_id === struct.id)
 
         super_user? || owner?
       end
@@ -129,7 +126,7 @@ defmodule Rajska do
       def has_context_access?(context, scope, {scope_field, field_value}, rule) do
         context
         |> get_current_user()
-        |> has_user_access?(scope, {scope_field, field_value}, rule)
+        |> has_user_access?(scope.__struct__([{scope_field, field_value}]), rule)
       end
 
       defoverridable Authorization
diff --git a/lib/schema.ex b/lib/schema.ex
index c056f92..ad04e32 100644
--- a/lib/schema.ex
+++ b/lib/schema.ex
@@ -3,11 +3,8 @@ defmodule Rajska.Schema do
   Concatenates Rajska middlewares with Absinthe middlewares and validates Query Authorization configuration.
   """
 
-  alias Absinthe.Type.{
-    Field,
-    Middleware,
-    Object
-  }
+  alias Absinthe.Middleware
+  alias Absinthe.Type.{Field, Object}
 
   alias Rajska.{
     FieldAuthorization,
diff --git a/mix.exs b/mix.exs
index 8421d63..7fbf4f5 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Rajska.MixProject do
   def project do
     [
       app: :rajska,
-      version: "0.8.1",
+      version: "0.9.0",
       elixir: "~> 1.8",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
@@ -13,12 +13,14 @@ defmodule Rajska.MixProject do
       description: "Rajska is an authorization library for Absinthe.",
       package: package(),
       elixirc_paths: elixirc_paths(Mix.env()),
+      aliases: aliases(),
       test_coverage: [tool: ExCoveralls],
       preferred_cli_env: [
         coveralls: :test,
         "coveralls.detail": :test,
         "coveralls.post": :test,
-        "coveralls.html": :test
+        "coveralls.html": :test,
+        "test.all": :test
       ]
     ]
   end
@@ -51,4 +53,13 @@ defmodule Rajska.MixProject do
       {:excoveralls, "~> 0.11", only: :test},
     ]
   end
+
+  defp aliases do
+    [
+      "test.all": [
+        "credo --strict",
+        "test"
+      ]
+    ]
+  end
 end
diff --git a/test/middlewares/field_authorization_test.exs b/test/middlewares/field_authorization_test.exs
index c9fff0c..87ee38b 100644
--- a/test/middlewares/field_authorization_test.exs
+++ b/test/middlewares/field_authorization_test.exs
@@ -17,10 +17,10 @@ defmodule Rajska.FieldAuthorizationTest do
       valid_roles: [:user, :admin],
       super_role: :admin
 
-    def has_user_access?(_current_user, User, _field, :private), do: false
-    def has_user_access?(%{role: :admin}, User, _field, :default), do: true
-    def has_user_access?(%{id: user_id}, User, {:id, id}, :default) when user_id === id, do: true
-    def has_user_access?(_current_user, User, _field, :default), do: false
+    def has_user_access?(_current_user, %User{}, :private), do: false
+    def has_user_access?(%{role: :admin}, %User{}, :default), do: true
+    def has_user_access?(%{id: user_id}, %User{id: id}, :default) when user_id === id, do: true
+    def has_user_access?(_current_user, %User{}, :default), do: false
   end
 
   defmodule Schema do
diff --git a/test/middlewares/object_scope_authorization_test.exs b/test/middlewares/object_scope_authorization_test.exs
index 7b62109..9c61d25 100644
--- a/test/middlewares/object_scope_authorization_test.exs
+++ b/test/middlewares/object_scope_authorization_test.exs
@@ -5,6 +5,7 @@ defmodule Rajska.ObjectScopeAuthorizationTest do
     defstruct [
       id: 1,
       total: 10,
+      user_id: nil
     ]
   end
 
@@ -39,18 +40,18 @@ defmodule Rajska.ObjectScopeAuthorizationTest do
       valid_roles: [:user, :admin],
       super_role: :admin
 
-    def has_user_access?(%{role: :admin}, User, _field, :default), do: true
-    def has_user_access?(%{id: user_id}, User, {:id, id}, :default) when user_id === id, do: true
-    def has_user_access?(_current_user, User, _field, :default), do: false
-    def has_user_access?(_current_user, User, _field, :object), do: false
+    def has_user_access?(%{role: :admin}, %User{}, :default), do: true
+    def has_user_access?(%{id: user_id}, %User{id: id}, :default) when user_id === id, do: true
+    def has_user_access?(_current_user, %User{}, :default), do: false
+    def has_user_access?(_current_user, %User{}, :object), do: false
 
-    def has_user_access?(%{role: :admin}, Company, _field, :default), do: true
-    def has_user_access?(%{id: user_id}, Company, {:user_id, company_user_id}, :default) when user_id === company_user_id, do: true
-    def has_user_access?(_current_user, Company, _field, :default), do: false
+    def has_user_access?(%{role: :admin}, %Company{}, :default), do: true
+    def has_user_access?(%{id: user_id}, %Company{user_id: company_user_id}, :default) when user_id === company_user_id, do: true
+    def has_user_access?(_current_user, %Company{}, :default), do: false
 
-    def has_user_access?(%{role: :admin}, Wallet, _field, :default), do: true
-    def has_user_access?(%{id: user_id}, Wallet, {:user_id, id}, :default) when user_id === id, do: true
-    def has_user_access?(_current_user, Wallet, _field, :default), do: false
+    def has_user_access?(%{role: :admin}, %Wallet{}, :default), do: true
+    def has_user_access?(%{id: user_id}, %Wallet{user_id: id}, :default) when user_id === id, do: true
+    def has_user_access?(_current_user, %Wallet{}, :default), do: false
   end
 
   defmodule Schema do
diff --git a/test/middlewares/query_scope_authorization_test.exs b/test/middlewares/query_scope_authorization_test.exs
index bf003da..4e88c18 100644
--- a/test/middlewares/query_scope_authorization_test.exs
+++ b/test/middlewares/query_scope_authorization_test.exs
@@ -21,12 +21,12 @@ defmodule Rajska.QueryScopeAuthorizationTest do
       valid_roles: [:user, :admin],
       super_role: :admin
 
-    def has_user_access?(%{role: :admin}, User, _field, :default), do: true
-    def has_user_access?(%{id: user_id}, User, {:id, id}, :default) when user_id === id, do: true
-    def has_user_access?(_current_user, User, _field, :default), do: false
+    def has_user_access?(%{role: :admin}, %User{}, :default), do: true
+    def has_user_access?(%{id: user_id}, %User{id: id}, :default) when user_id === id, do: true
+    def has_user_access?(_current_user, %User{}, :default), do: false
 
-    def has_user_access?(_current_user, BankAccount, _field, :edit), do: false
-    def has_user_access?(_current_user, BankAccount, _field, :read_only), do: true
+    def has_user_access?(_current_user, %BankAccount{}, :edit), do: false
+    def has_user_access?(_current_user, %BankAccount{}, :read_only), do: true
   end
 
   defmodule Schema do