find_user users helper method no longer overrides find_user API helper method.

changelogs/unreleased/37467-helper-method-from-users-endpoint-overrides-api-helper-method.yml

+---
+title: find_user Users helper method no longer overrides find_user API helper method.
+merge_request: 14418
+author:
+type: fixed

lib/api/users.rb

@@ -11,7 +11,7 @@ module API
       end
       helpers do
-        def find_user(params)
+        def find_user_by_id(params)
           id = params[:user_id] || params[:id]
           User.find_by(id: id) || not_found!('User')
         end
@@ -430,7 +430,7 @@ module API
         resource :impersonation_tokens do
           helpers do
             def finder(options = {})
-              user = find_user(params)
+              user = find_user_by_id(params)
               PersonalAccessTokensFinder.new({ user: user, impersonation: true }.merge(options))
             end

spec/requests/api/users_spec.rb

@@ -125,6 +125,15 @@ describe API::Users do
     end
     context "when admin" do
+      context 'when sudo is defined' do
+        it 'does not return 500' do
+          admin_personal_access_token = create(:personal_access_token, user: admin).token
+          get api("/users?private_token=#{admin_personal_access_token}&sudo=#{user.id}", admin)
+
+          expect(response).to have_http_status(:success)
+        end
+      end
+
       it "returns an array of users" do
         get api("/users", admin)