To Set Default Thumbnails for MVB Lesson

Request

• Base URL
  https://api.eon-xr.com (the document declares no server; this is the origin it was published from)
• Auth
  HTTP bearer
• TypeScript
  https://skmtc.dev/eon-xr/apis/eonxr-api/docs/Lesson/SetDefaultMVBLessonThumbnail/post.ts

  A function with typed inputs. Its response is checked against the schema.