diff --git a/lib/pleroma/web/admin_api/controllers/user_controller.ex b/lib/pleroma/web/admin_api/controllers/user_controller.ex
index ed93af11c..9ac275396 100644
--- a/lib/pleroma/web/admin_api/controllers/user_controller.ex
+++ b/lib/pleroma/web/admin_api/controllers/user_controller.ex
@@ -18,7 +18,7 @@ defmodule Pleroma.Web.AdminAPI.UserController do
 
   @users_page_size 50
 
-  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+  plug(Pleroma.Web.ApiSpec.CastAndValidate, replace_params: false)
 
   plug(
     OAuthScopesPlug,
@@ -51,13 +51,22 @@ defmodule Pleroma.Web.AdminAPI.UserController do
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.UserOperation
 
-  def delete(conn, %{nickname: nickname}) do
+  def delete(%{private: %{open_api_spex: %{params: %{nickname: nickname}}}} = conn, _) do
     conn
-    |> Map.put(:body_params, %{nicknames: [nickname]})
-    |> delete(%{})
+    |> do_deletes([nickname])
   end
 
-  def delete(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
+  def delete(
+        %{
+          private: %{open_api_spex: %{body_params: %{nicknames: nicknames}}}
+        } = conn,
+        _
+      ) do
+    conn
+    |> do_deletes(nicknames)
+  end
+
+  defp do_deletes(%{assigns: %{user: admin}} = conn, nicknames) when is_list(nicknames) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
 
     Enum.each(users, fn user ->
@@ -77,9 +86,13 @@ def delete(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = co
   def follow(
         %{
           assigns: %{user: admin},
-          body_params: %{
-            follower: follower_nick,
-            followed: followed_nick
+          private: %{
+            open_api_spex: %{
+              body_params: %{
+                follower: follower_nick,
+                followed: followed_nick
+              }
+            }
           }
         } = conn,
         _
@@ -102,9 +115,13 @@ def follow(
   def unfollow(
         %{
           assigns: %{user: admin},
-          body_params: %{
-            follower: follower_nick,
-            followed: followed_nick
+          private: %{
+            open_api_spex: %{
+              body_params: %{
+                follower: follower_nick,
+                followed: followed_nick
+              }
+            }
           }
         } = conn,
         _
@@ -124,7 +141,13 @@ def unfollow(
     json(conn, "ok")
   end
 
-  def create(%{assigns: %{user: admin}, body_params: %{users: users}} = conn, _) do
+  def create(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{body_params: %{users: users}}}
+        } = conn,
+        _
+      ) do
     changesets =
       users
       |> Enum.map(fn %{nickname: nickname, email: email, password: password} ->
@@ -178,7 +201,13 @@ def create(%{assigns: %{user: admin}, body_params: %{users: users}} = conn, _) d
     end
   end
 
-  def show(%{assigns: %{user: admin}} = conn, %{nickname: nickname}) do
+  def show(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{params: %{nickname: nickname}}}
+        } = conn,
+        _
+      ) do
     with %User{} = user <- User.get_cached_by_nickname_or_id(nickname, for: admin) do
       render(conn, "show.json", %{user: user})
     else
@@ -186,7 +215,11 @@ def show(%{assigns: %{user: admin}} = conn, %{nickname: nickname}) do
     end
   end
 
-  def toggle_activation(%{assigns: %{user: admin}} = conn, %{nickname: nickname}) do
+  def toggle_activation(
+        %{assigns: %{user: admin}, private: %{open_api_spex: %{params: %{nickname: nickname}}}} =
+          conn,
+        _
+      ) do
     user = User.get_cached_by_nickname(nickname)
 
     {:ok, updated_user} = User.set_activation(user, !user.is_active)
@@ -202,7 +235,13 @@ def toggle_activation(%{assigns: %{user: admin}} = conn, %{nickname: nickname})
     render(conn, "show.json", user: updated_user)
   end
 
-  def activate(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
+  def activate(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{body_params: %{nicknames: nicknames}}}
+        } = conn,
+        _
+      ) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.set_activation(users, true)
 
@@ -215,7 +254,13 @@ def activate(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} =
     render(conn, "index.json", users: updated_users)
   end
 
-  def deactivate(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
+  def deactivate(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{body_params: %{nicknames: nicknames}}}
+        } = conn,
+        _
+      ) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.set_activation(users, false)
 
@@ -228,7 +273,13 @@ def deactivate(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}}
     render(conn, "index.json", users: updated_users)
   end
 
-  def approve(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
+  def approve(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{body_params: %{nicknames: nicknames}}}
+        } = conn,
+        _
+      ) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.approve(users)
 
@@ -241,7 +292,13 @@ def approve(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = c
     render(conn, "index.json", users: updated_users)
   end
 
-  def suggest(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
+  def suggest(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{body_params: %{nicknames: nicknames}}}
+        } = conn,
+        _
+      ) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.set_suggestion(users, true)
 
@@ -254,7 +311,13 @@ def suggest(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = c
     render(conn, "index.json", users: updated_users)
   end
 
-  def unsuggest(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} = conn, _) do
+  def unsuggest(
+        %{
+          assigns: %{user: admin},
+          private: %{open_api_spex: %{body_params: %{nicknames: nicknames}}}
+        } = conn,
+        _
+      ) do
     users = Enum.map(nicknames, &User.get_cached_by_nickname/1)
     {:ok, updated_users} = User.set_suggestion(users, false)
 
@@ -267,7 +330,7 @@ def unsuggest(%{assigns: %{user: admin}, body_params: %{nicknames: nicknames}} =
     render(conn, "index.json", users: updated_users)
   end
 
-  def index(conn, params) do
+  def index(%{private: %{open_api_spex: %{params: params}}} = conn, _) do
     {page, page_size} = page_params(params)
     filters = maybe_parse_filters(params[:filters])