google認証で登録したユーザーにAPIでログインしたい

https://qiita.com/k-shogo/items/6d687c38b0f7b3ade6f5
のサイトを参考にapiからdeviseのアカウントにログインすることができました。

ただgoogle_oauth2で登録したアカウントにログインする方法がわかりません。
postmanで「localhost:3000/users/auth/google_oauth2」しようとすると以下のエラーが出てしまいます。

errorlog
1Started POST "/users/auth/google_oauth2" 
2for ::1 at 2021-04-20 21:13:34 +0900     
3D, [2021-04-20T21:13:35.070379 #11068] DEBUG -- omniauth: (google_oauth2) Request 
4phase initiated.
5E, [2021-04-20T21:13:35.071133 #11068] ERROR -- omniauth: (google_oauth2) Authentication failure! ActionController::InvalidAuthenticityToken: ActionController::InvalidAuthenticityToken, ActionController::InvalidAuthenticityToken
6Processing by Users::OmniauthCallbacksController#failure as */*
7Redirected to http://localhost:3000/
8Completed 302 Found in 4ms (ActiveRecord: 0.0ms | Allocations: 1146)
9
10
11Started GET "/" for ::1 at 2021-04-20 21:13:35 +0900
12Processing by PostsController#index as */*
13  Rendering layout layouts/post.html.slim  Rendering posts/index.html.slim within 
14layouts/post
15  Rendered posts/index.html.slim within layouts/post (Duration: 19.3ms | Allocations: 20448)
16[Webpacker] Everything's up-to-date. Nothing to do
17  Rendered layout layouts/post.html.slim 
18(Duration: 202.6ms | Allocations: 140042)Completed 200 OK in 232ms (Views: 205.2ms | ActiveRecord: 0.0ms | Allocations: 141770)
19