components:
  schemas:
    LoginData:
      description: Credentials and optional locale used during user sign-in.
      type: object
      additionalProperties: false
      required:
        - login
        - password
      properties:
        login:
          description: User login identifier, represented as an email address.
          type: string
          format: email
        password:
          description: User password submitted for authentication.
          type: string
          format: password
        locale:
          description: Optional locale preference provided at login time.
          type: string