core/homeassistant/components/heos/services.yaml

sign_in:
  description: Sign the controller in to a HEOS account.
  fields:
    username:
      description: The username or email of the HEOS account. [Required]
      example: "example@example.com"
    password:
      description: The password of the HEOS account. [Required]
      example: "password"

sign_out:
  description: Sign the controller out of the HEOS account.