curl --location --request GET 'http://127.0.0.1:9000/api/user-service/has-username?username=machen' \
--header 'Authorization: Bearer eyJhbGciOiJIUzUxMiJ9.eyJpYXQiOjE3NDQwMDE0ODQsImlzcyI6ImluZGV4MTIzMDYiLCJzdWIiOiJ7XCJyZWFsTmFtZVwiOlwi5b6Q5LiH6YeMXCIsXCJ1c2VySWRcIjpcIjE2ODMwMjU1NTIzNjQ1Njg1NzZcIixcInVzZXJuYW1lXCI6XCJhZG1pblwifSIsImV4cCI6MTc0NDA4Nzg4NH0.MCFgur9QEsOtP6N07B0kFnokTMDtBO98OWB-Iwwh5qWAbr_Y-ufyyxoKE6uhNd4BthS9bHh_xQDxDYsjfObt4g'{
"code": "string",
"message": null,
"data": true,
"requestId": null,
"success": true
}