$ cd <spring-rest-oauth2-sample root path>
$ ./gradlew clean build bootRun

$ curl -X POST -vu ios_app:123456 http://localhost:8080/oauth/token -H "Accept: application/json" -d "password=admin&username=admin&grant_type=password&scope=read&client_secret=123456&client_id=ios_app"

url: http://localhost:8080/oauth/token
POST
headers: Authorization: Basic <Encrypt client_id:client_secret by HTTP Basic>
playload: password=admin&username=admin&grant_type=password&scope=read

$ curl http://localhost:8080/welcome -H "Authorization: Bearer <access_token_returned>"

{
	"id":2,
	"content":"Hello, admin!"
}

url: http://localhost:8080/welcome
GET
headers: Authorization: bearer <access_token_returned>

$ curl http://localhost:8080/resources/users/admin -H "Authorization: Bearer <access_token_returned>"

{
	"name":"admin",
	"username":"admin"
}

url: http://localhost:8080/resources/users/admin
GET
headers: Authorization: bearer <access_token_returned>

curl -X POST -vu ios_app:123456 http://localhost:8080/oauth/token -H "Accept: application/json" -d "grant_type=refresh_token&refresh_token=<refresh_token_returned>&client_secret=123456&client_id=ios_app"

url: http://localhost:8080/oauth/token
POST
headers: Authorization: Basic <Encrypt client_id:client_secret by HTTP Basic>
playload: grant_type=refresh_token&refresh_token=<refresh_token_returned>