アクセストークン

curl -X POST https://api.box.com/oauth2/token \
    -H "content-type: application/x-www-form-urlencoded" \
    -d '...'

{
  "access_token": "c3FIOG9vSGV4VHo4QzAyg5T1JvNnJoZ3ExaVNyQWw6WjRsanRKZG5lQk9qUE1BVQ",
  "expires_in": 3600,
  "token_type": "bearer",
  "refresh_token": "c3FIOG9vSGV4VHo4QzAyg5T1JvNnJoZ3ExaVNyQWw6WjRsanRKZG5lQk9qUE1BVQ",
  "issued_token_type": "urn:ietf:params:oauth:token-type:access_token"
}

curl --location --request POST 'https://api.box.com/oauth2/token' \
    --header 'Content-Type: application/x-www-form-urlencoded' \
    --data-urlencode '...'

{
  "access_token": "DkXZmsjUKizvL2z0WiaLvMBeQ756XCGGf",
  "expires_in": 4123,
  "restricted_to": [],
  "issued_token_type": "bearer"
}