V1 API deprecation message on login

V1 API deprecation message on login

When i login to crm, i get this message. I migrated token generation(server-side app) to V2 this week and this message is still showing. Where can i find what else am I using from V1 API?

  1. Attention:Usage of deprecated V1 API found
  2. Your organization is still using the deprecated V1 API and it will stop working from Jan 1 , 2020.